Portal (video game) (English Wikipedia)

Elliot, Shawn (October 10, 2007). "Portal (PC)". 1UP. Archived from the original on June 25, 2012. Retrieved August 3, 2008.
Leone, Matt (September 8, 2006). "Portal Preview". 1UP.com. Archived from the original on September 27, 2007. Retrieved September 11, 2006.
Elliot, Shawn (February 6, 2008). "Beyond the Box: Orange Box Afterthoughts". 1UP. Archived from the original on December 6, 2012. Retrieved February 14, 2008.
Hayward, Andrew (October 27, 2008). "Portal: Still Alive (Xbox 360)". 1UP. Archived from the original on July 18, 2012. Retrieved October 27, 2008.
"2007 1UP Network Editorial Awards from 1UP.com". 1UP.com. Archived from the original on February 26, 2009. Retrieved February 18, 2008.

abc.net.au

"Game of the Year". Good Game Stories. December 12, 2007. Archived from the original on January 7, 2012. Retrieved January 31, 2008.

alesiaglidewell.com

Glidewell, Alésia. "On-Camera — Alésia Glidewell — Voice Over Artist". AlesiaGlidewell.com. Archived from the original on September 3, 2011. Retrieved April 27, 2014.

aperturescience.com

"Aperture Science Web Site (login: cjohnson password: tier3)". Valve. Archived from the original on September 17, 2010. Retrieved November 22, 2009.

archive.today

Irwin, Mary Jane (February 23, 2008). "GDC: A Portal Postmortem". Next-Gen Biz. Archived from the original on September 5, 2012. Retrieved February 26, 2008.
Elliot, Shawn (February 6, 2008). "Beyond the Box: Orange Box Afterthoughts". 1UP. Archived from the original on December 6, 2012. Retrieved February 14, 2008.
Glidewell, Alésia. "On-Camera — Alésia Glidewell — Voice Over Artist". AlesiaGlidewell.com. Archived from the original on September 3, 2011. Retrieved April 27, 2014.
Hayward, Andrew (October 27, 2008). "Portal: Still Alive (Xbox 360)". 1UP. Archived from the original on July 18, 2012. Retrieved October 27, 2008.
"GameSpot's Best of 2007: Best Original Game Mechanic Special Achievement". GameSpot. Archived from the original on December 5, 2008. Retrieved February 18, 2008.

arstechnica.com

Kuchera, Ben (September 16, 2011). "Portal is used to teach science as Valve gives game away for limited time". Ars Technica. Archived from the original on September 23, 2011. Retrieved September 16, 2011.
Neuls, Johnathan (November 12, 2007). "Valve to sell official Weighted Companion Cube plushies". Ars Technica. Archived from the original on April 19, 2008. Retrieved April 18, 2008.
Kurchera, Ben (January 2, 2008). "Kiss Me, Kill Me, Thrill Me: ups and downs in gaming 2007". Ars Technica. Archived from the original on August 29, 2015. Retrieved April 18, 2008.
Webster, Andrew (March 5, 2010). "Portal 2 is official, first image inside". Ars Technica. Archived from the original on March 7, 2010. Retrieved March 5, 2010.

avclub.com

Dahlen, Chris; Mastrapa, Gus (December 24, 2007). "A. V. Club Best Games of 2007". A. V. Club. Archived from the original on December 29, 2008. Retrieved April 27, 2014.

bit-tech.net

Persson, Magnus (January 28, 2008). "Weighted Companion Cube PC case mods". Bit-tech.net. Archived from the original on February 14, 2008. Retrieved February 25, 2008.

boingboing.net

offworld.boingboing.net

Boyer, Brandon (July 16, 2009). "Chell's bells: Portal on the iPhone". Boing Boing Offworld. Archived from the original on October 29, 2013. Retrieved July 17, 2009.

carina.org.uk

Lizzie (January 1, 2008). "How to Make a Weighted Companion Cube Cake". Archived from the original on August 13, 2011. Retrieved February 7, 2008.

cmu.edu

etc.cmu.edu

Montfort, Nick (2009). "Portal of Ivory, Passage of Horn". In Drew Davidson; et al. (eds.). Well Played 1.0: Video Game, Value and Meaning. ETC Press. ISBN 978-0-557-06975-0. Archived from the original on January 8, 2010. Retrieved January 17, 2010.

cogconnected.com

"Portal 'Demake' Will Find a Home on the Nintendo 64". May 16, 2022. Archived from the original on May 16, 2022. Retrieved September 7, 2022.

computerandvideogames.com

Francis, Tom (May 9, 2007). "PC Preview: Portal— PC Gamer Magazine". ComputerAndVideoGames.com. Archived from the original on June 12, 2010. Retrieved October 5, 2007.
Zitron, Ed (January 5, 2008). "Portal Maps Investigated". CVG. Archived from the original on January 7, 2008. Retrieved January 5, 2008.

cymonsgames.com

Larson, Joseph (January 12, 2011). "ASCIIportal | Cymonsgames". Joseph Larson. Archived from the original on December 29, 2010. Retrieved January 12, 2011.

digitaltrends.com

Roach, Jacob (December 6, 2022). "Why Portal RTX is the most demanding game I've ever tested". Digital Trends. Retrieved March 17, 2024.

doi.org

Schiller, Nicholas (2008). "A Portal to Student Learning: What Instruction Librarians can Learn from Video Game Design". Reference Services Review. 36 (4): 351–365. CiteSeerX 10.1.1.623.999. doi:10.1108/00907320810920333. Archived from the original on September 21, 2013. Retrieved June 25, 2009.

engadget.com

Hollister, Sean (April 29, 2010). "Steam for Mac Opens a Portal to May 12, steps through". Engadget. Archived from the original on May 3, 2010. Retrieved May 11, 2010.

escapistmagazine.com

"The Orange Box - Zero Punctuation Video Gallery - The Escapist". The Escapist. Archived from the original on October 6, 2014. Retrieved October 6, 2014.
Goldman, Tom (August 22, 2010). "College Professor Requires Students to Study Portal". The Escapist. Archived from the original on August 25, 2010. Retrieved August 22, 2010.

eurogamer.net

Bramwell, Tom (May 15, 2007). "Portal: First Impressions". Eurogamer. Archived from the original on October 28, 2007. Retrieved October 5, 2007.
Bradwell, Tom (October 10, 2007). "Portal". Eurogamer. Archived from the original on August 10, 2011. Retrieved February 25, 2008.
Purchase, Robert (September 16, 2011). "Portal free on Steam until 20th Sept". Eurogamer. Archived from the original on September 23, 2011. Retrieved September 16, 2011.
Phillips, Tom (February 9, 2022). "Portal and Portal 2 coming to Nintendo Switch". Eurogamer. Archived from the original on February 9, 2022. Retrieved February 9, 2022.
Reed, Kristen (October 10, 2007). "The Orange Box". Eurogamer. Archived from the original on October 26, 2007. Retrieved February 14, 2008.
"Eurogamer's Top 50 Games of 2007". Eurogamer. December 28, 2007. Archived from the original on August 29, 2011. Retrieved January 1, 2008.

forbes.com

Pinchefsky, Carol (June 26, 2012). "Kim Swift, Creator of 'Portal,' Discusses Her Latest Game, 'Quantum Conundrum'". Forbes. Archived from the original on June 29, 2012. Retrieved June 26, 2012.

g4tv.com

Keil, Matt. "G4 Review — The Orange Box". G4TV. Archived from the original on November 3, 2012. Retrieved October 19, 2007.
"Winners of X-Play Best of 2007 Awards Announced—BioShock is Video Game of the Year". G4TV. December 17, 2007. Archived from the original on January 13, 2012. Retrieved January 31, 2008.
"X-Play Best of 2007: Most Original Game". G4. December 18, 2007. Archived from the original on May 9, 2018. Retrieved February 25, 2008.
Gaskill, Jake (March 3, 2010). "Rumor: Valve To Make Portal 2 Announcement During GDC 2010". X-Play. Archived from the original on January 8, 2018. Retrieved March 3, 2010.

gamasutra.com

Alessi, Jeremy (August 26, 2008). "Games Demystified: Portal". Gamasutra. Archived from the original on August 7, 2010. Retrieved August 28, 2008.
Graff, Kris (November 2, 2009). "Valve's Writers And The Creative Process". Gamasutra. Archived from the original on November 5, 2009. Retrieved November 2, 2009.
Caolli, Eric (May 12, 2010). "Steam Launched For Mac, Portal Offered For Free". Gamasutra. Archived from the original on May 13, 2010. Retrieved May 13, 2010.
Remo, Chris (May 19, 2010). "Portal Racks Up 1.5M Free Downloads On PC, Mac". Gamasutra. Archived from the original on May 21, 2010. Retrieved May 19, 2010.
Rose, Mike (April 20, 2011). "Portal Sells 4 Million Excluding Steam Sale". Gamasutra. Archived from the original on April 24, 2011. Retrieved April 20, 2011.
Alexander, Leigh (December 19, 2007). "Gamasutra's Best Of 2007: Top 5 Poignant Game Moments". Gamasutra. Archived from the original on December 21, 2007. Retrieved December 19, 2007.

gameinformer.com

VanBurkleo, Meagan (March 24, 2010). "Aperture Science: A History". Game Informer. Archived from the original on March 27, 2010. Retrieved March 24, 2010.
Reeves, Ben (March 10, 2010). "Exploring Portal's Creation And Its Ties To Half-Life 2". Game Informer. Archived from the original on March 14, 2010. Retrieved March 10, 2010.
Berghammer, Billy (August 25, 2006). "GC 06:Valve's Doug Lombardi Talks Half-Life 2 Happenings". Game Informer. Archived from the original on October 2, 2007. Retrieved September 27, 2007.
VanBurkleo, Meagan (March 31, 2010). "Let There Be Cake". Game Informer. Archived from the original on April 2, 2010. Retrieved March 31, 2010.
Turi, Tim (September 1, 2012). "Chell Almost Married A Turret In Portal 2". Game Informer. Archived from the original on September 5, 2012. Retrieved September 6, 2012.

gamepro.com

The GamePros (December 27, 2007). "GamePro Editors' Choice *2007* (Pg. 2/5)". GamePro. Archived from the original on December 31, 2007. Retrieved February 18, 2008.

gamesetwatch.com

Remo, Chris (July 20, 2008). "Portal: Still Alive Explained". GameSetWatch. Archived from the original on July 29, 2008. Retrieved July 21, 2008.
Johnson, Daniel (June 1, 2009). "Column: 'Lingua Franca' – Portal and the Deconstruction of the Institution". GameSetWatch. Archived from the original on June 5, 2009. Retrieved June 1, 2009.

gamesindustry.biz

Lee, James (April 28, 2008). "Portal was offered to XBLA, but rejected". GamesIndustry.biz. Archived from the original on May 17, 2008. Retrieved June 14, 2008.

gamespot.com

Ocampo, Jason (July 13, 2006). "Half-Life 2: Episode Two — The Return of Team Fortress 2 and Other Surprises". GameSpot. Archived from the original on March 23, 2014. Retrieved July 21, 2006.
"GameSpot's Best of 2007: Best Puzzle Game Genre Awards". GameSpot. Archived from the original on June 24, 2018. Retrieved February 18, 2008.
"GameSpot's Best of 2007: Best New Character(s) Special Achievement". GameSpot. Archived from the original on January 28, 2012. Retrieved February 18, 2008.
"GameSpot's Best of 2007: Best Original Game Mechanic Special Achievement". GameSpot. Archived from the original on December 5, 2008. Retrieved February 18, 2008.

uk.gamespot.com

"Portal BioShocks GDC Awards". GameSpot. Archived from the original on January 4, 2012. Retrieved February 21, 2008.

gamespy.com

planethalflife.gamespy.com

Pratt (September 30, 2007). "Pratt and Chief interview the Portal team at VALVe headquarters". Planet Half-Life. Archived from the original on January 15, 2008. Retrieved February 7, 2008.
Phillips, John (September 22, 2009). "Portal: Prelude". GameSpy. Archived from the original on December 23, 2008. Retrieved December 18, 2008.

pc.gamespy.com

Accardo, Sal (October 9, 2007). "Portal (PC)". GameSpy. Archived from the original on January 5, 2011. Retrieved February 25, 2008.

xbox360.gamespy.com

McGarvey, Sterline (October 10, 2007). "The Orange Box (X360)". GameSpy. Archived from the original on January 19, 2008. Retrieved February 14, 2008.

goty.gamespy.com

"GameSpy's Game of the Year 2007: Special Awards". GameSpy. Archived from the original on October 29, 2013. Retrieved April 27, 2014.

gamesradar.com

GamesRadar Staff (February 25, 2015). "The 100 best games ever". GamesRadar. p. 12. Archived from the original on January 15, 2013. Retrieved October 4, 2018.
Bailey, Dustin (January 10, 2024). "After years of supporting mods and fan games, Valve takes action against Team Fortress and Portal fan projects". GamesRadar. Archived from the original on January 11, 2024. Retrieved January 11, 2024.

gametrailers.com

Geoff, Keighley (March 1, 2008). "GameTrailers Episode 106". GameTrailers.com. Archived from the original on March 5, 2008. Retrieved March 25, 2008.

ghostarchive.org

Portal Problems - Lecture 11 - CS50's Introduction to Game Development 2018. YouTube. CS50. May 4, 2018. Event occurs at 27:45. Archived from the original on December 21, 2021.

giantbomb.com

Klepek, Patrick (May 18, 2011). "Intro to GLaDOS 101: A Professor's Decision to Teach Portal". Giant Bomb. Archived from the original on May 21, 2011. Retrieved May 18, 2011.

gizmodo.com

"Portal Ported: Fan Remakes Valve's Classic Puzzle Game for Nintendo 64". May 16, 2022. Archived from the original on May 16, 2022. Retrieved September 7, 2022.

ign.com

bestof.ign.com

"IGN Best of 2007: PC Best Puzzle Game". IGN. Archived from the original on October 16, 2013. Retrieved April 27, 2014.
"IGN Best of 2007: Xbox 360 – Best Puzzle Game". IGN. Archived from the original on June 14, 2012. Retrieved April 27, 2014.
"IGN Best of 2007: PC — Most Innovative Design". IGN. Archived from the original on October 16, 2013. Retrieved April 27, 2014.
"IGN Best of 2007: Xbox 360 – Best End Credit Song". IGN. Archived from the original on February 26, 2012. Retrieved April 27, 2014.
"IGN Best of 2007: Overall — Best Puzzle Game". IGN. Archived from the original on November 12, 2013. Retrieved April 27, 2014.
"IGN Best of 2007: Overall — Most Innovative Design". IGN. Archived from the original on November 12, 2013. Retrieved April 27, 2014.

ign.com

"Top 100 Video Games of All Time". IGN. 2018. Archived from the original on June 14, 2018. Retrieved June 15, 2018.
Bailey, Kat (January 10, 2024). "Team Fortress: Source 2 and Portal 64 Fan Projects Shut Down by Valve Takedowns". IGN. Archived from the original on January 11, 2024. Retrieved January 11, 2024.
Jorgensen, Tom (May 24, 2021). "Portal Movie Still Alive, in Development at Warner Bros., Says Producer JJ Abrams". IGN. Archived from the original on May 24, 2021. Retrieved March 15, 2022.

comics.ign.com

Esposito, Joey (April 8, 2011). "Portal 2: Lab Rat – Part 1". IGN. Archived from the original on April 10, 2011. Retrieved April 11, 2011.
Esposito, Joey (April 11, 2011). "Read Portal 2: Lab Rat – Part 2". IGN. Archived from the original on April 13, 2011. Retrieved April 11, 2011.

pc.ign.com

Adams, Dan (October 9, 2007). "Portal Review". IGN. Archived from the original on March 10, 2011. Retrieved February 25, 2008.
Adams, Dan. "IGN: Portal Review". IGN. Archived from the original on March 11, 2011. Retrieved October 19, 2007.

au.pc.ign.com

Craddock, David (October 3, 2007). "Portal: Final Hands-on". IGN. Archived from the original on April 15, 2011. Retrieved October 5, 2007.

xbox360.ign.com

"IGN's Top 10 Xbox Live Arcade Games". IGN. May 7, 2009. Archived from the original on April 13, 2012. Retrieved August 7, 2009.

xboxlive.ign.com

"The Top 25 Xbox Live Arcade Games". IGN. September 16, 2010. Archived from the original on September 18, 2010. Retrieved September 16, 2010.

video.ign.com

"IGN's top 100 villains". IGN. May 14, 2010. Archived from the original on May 18, 2010. Retrieved May 18, 2010.

inputmag.com

"This N64 demake of Portal shouldn't work, but it does". May 18, 2022. Archived from the original on May 18, 2022. Retrieved September 7, 2022.

interactive.org

"D.I.C.E. Awards By Video Game Details The Orange Box: Portal". interactive.org. Academy of Interactive Arts & Sciences. Archived from the original on November 13, 2023. Retrieved November 13, 2023.
"D.I.C.E. Awards By Video Game Details The Orange Box". interactive.org. Academy of Interactive Arts & Sciences. Archived from the original on November 13, 2023. Retrieved November 13, 2023.

jetlogs.org

Jetlogs (October 29, 2007). "Companion Cube Plushie Sewing Pattern". Jetlogs. Archived from the original on February 13, 2008. Retrieved January 31, 2008.
Jetlogs (October 14, 2007). "Portal: Weighted Companion Cube Papercraft". Jetlogs. Archived from the original on February 4, 2008. Retrieved January 31, 2008.

jonathancoulton.com

Coulton, Jonathan (October 15, 2007). "Portal: The Skinny". Jonathan Coulton's blog. Archived from the original on August 30, 2015. Retrieved November 1, 2007.

joystiq.com

Hinkle, David (September 24, 2012). "Portal 2: Songs to Test By (Collectors Edition) out on Oct. 30". Joystiq. Archived from the original on November 25, 2012. Retrieved September 24, 2012.
Kiestmann, Ludwig (March 6, 2008). "Individual Orange Box games hit retail April 9". Joystiq. Archived from the original on March 6, 2008. Retrieved March 6, 2008.
Kietzmann, Ludwig (January 1, 2008). "Joystiq's Top 10 of 2007: Portal". Joystiq. Archived from the original on October 27, 2012. Retrieved February 18, 2008.

kotaku.com

McWhertor, Michael (February 23, 2008). "Portal Devs Reveal the GLaDOS That Never Was, Inspiration Behind Weighted Companion Cube". Kotaku. Archived from the original on February 26, 2008. Retrieved February 26, 2008.
de Marco, Flynn (October 21, 2007). "The Weighted Companion Cube Cake". Kotaku. Archived from the original on February 2, 2008. Retrieved January 31, 2008.
De Marco, Flynn (December 15, 2007). "Official Plush Weighted Companion Cube Sells Out". Kotaku. Archived from the original on March 4, 2008. Retrieved February 21, 2008.
Plunkett, Luke (June 10, 2008). "Casting call reveals Portal 2 details". Kotaku. Archived from the original on June 24, 2008. Retrieved July 18, 2008.
Plunkett, Luke (June 10, 2008). "More details on Portal 2's bad guy". Kotaku. Archived from the original on June 24, 2008. Retrieved July 18, 2008.
Plunkett, Luke (July 8, 2009). "It's Portal, Running In ASCII". Kotaku. Archived from the original on July 12, 2009. Retrieved July 16, 2009.
McWhertor, Michael (August 29, 2011). "Mari0 Is What Happens When Mario Gets a Portal Gun". Kotaku. Archived from the original on February 11, 2017. Retrieved February 10, 2017.
"Somehow, the N64 Can do Portal". May 16, 2022. Archived from the original on May 16, 2022. Retrieved September 7, 2022.

learningwithportals.com

"Learn With Portals". learningwithportals.com. Valve. September 15, 2011. Archived from the original on October 6, 2011. Retrieved April 27, 2014.

mendeley.com

Schiller, Nicholas (2008). "A Portal to Student Learning: What Instruction Librarians can Learn from Video Game Design". Reference Services Review. 36 (4): 351–365. CiteSeerX 10.1.1.623.999. doi:10.1108/00907320810920333. Archived from the original on September 21, 2013. Retrieved June 25, 2009.

metacritic.com

"The Orange Box (PC)". Metacritic. Archived from the original on August 18, 2009. Retrieved December 27, 2017.
"The Orange Box (Xbox 360)". Metacritic. Archived from the original on August 18, 2009. Retrieved December 27, 2017.
"The Orange Box (PS3)". Metacritic. Archived from the original on August 18, 2009. Retrieved February 25, 2008.
"Portal: Still Alive (xbox360: 2008)". Metacritic. Archived from the original on October 25, 2008. Retrieved October 27, 2008.
"Portal (pc: 2007): Reviews". Metacritic. Archived from the original on August 28, 2011. Retrieved October 22, 2007.
"Portal: Still Alive for Xbox 360 Reviews". Metacritic. Fandom. Archived from the original on August 17, 2010. Retrieved April 10, 2022.
"Portal with RTX for PC Reviews". Metacritic. Fandom. Archived from the original on February 2, 2023. Retrieved December 16, 2022.

next-gen.biz

Irwin, Mary Jane (February 23, 2008). "GDC: A Portal Postmortem". Next-Gen Biz. Archived from the original on September 5, 2012. Retrieved February 26, 2008.

nintendolife.com

"Random: Portal 64 Demake Shows Portal Running on "Real N64 Hardware"". May 15, 2022. Archived from the original on May 15, 2022. Retrieved September 7, 2022.

nuclearmonkeysoftware.com

"Things are heating up!". Narbacular Drop official site. July 17, 2006. Archived from the original on September 28, 2007. Retrieved July 21, 2006.

nvidia.com

blogs.nvidia.com

Paul, Jason (March 25, 2014). "What's in the Box? Portal – Valve's Popular PC Title – Coming to SHIELD". Nvidia. Archived from the original on June 5, 2014. Retrieved May 27, 2014.

nwsource.com

seattletimes.nwsource.com

Dudley, Breir (April 17, 2011). "'Portal' backstory a real Cinderella tale". Seattle Times. Archived from the original on April 20, 2011. Retrieved April 17, 2011.

oxmonline.com

"OXM's 2007 Game of the Year Awards". Official Xbox Magazine. March 17, 2008. Archived from the original on October 10, 2014. Retrieved March 21, 2008.

pcgamer.com

Stanton, Rich (April 26, 2011). "Erik Wolpaw on Portal 2's ending: "the [spoiler] is probably lurking out there somewhere"". PC Gamer. Archived from the original on April 30, 2011. Retrieved April 26, 2011.
Roberts, Samuel (October 10, 2017). "Valve reflects on The Orange Box, ten years later". PC Gamer. Archived from the original on October 10, 2017. Retrieved October 10, 2017.
Davenport, James (October 10, 2017). "'The cake is a lie'—the life and death of Portal's best baked meme". PC Gamer. Archived from the original on October 10, 2017. Retrieved October 10, 2017.
Stanton, Rich (September 5, 2023). "Legend has spent years making Portal for the N64 and by Gaben he's done it". PC Gamer. Archived from the original on November 20, 2023. Retrieved November 20, 2023.

pcworld.com

blogs.pcworld.com

Peckham, Matt (October 11, 2007). "Portal: The Flash Version". PC World. Archived from the original on April 24, 2011. Retrieved May 5, 2008.

penny-arcade.com

"Penny Arcade! We're Right Returns". Penny Arcade. December 28, 2007. Archived from the original on July 17, 2011. Retrieved December 28, 2007.

play.google.com

"Portal". Google Apps. May 12, 2014. Archived from the original on May 13, 2014. Retrieved May 13, 2014.

pocketgamer.co.uk

Spenser, Spanner (July 15, 2009). "Valve's Portal opened on the iPhone". Pocket Gamer. Archived from the original on July 18, 2009. Retrieved July 16, 2009.

polygon.com

Tach, Dave (May 26, 2014). "Why Nvidia created its own hardware platform and started developing games". Polygon. Vox Media. Archived from the original on May 27, 2014. Retrieved May 27, 2014.
Carpenter, Nicole (February 9, 2022). "Portal and Portal 2 coming to Nintendo Switch". Polygon. Archived from the original on February 9, 2022. Retrieved February 9, 2022.
Polygon Staff (November 27, 2017). "The 500 Best Video Games of All Time". Polygon.com. Archived from the original on March 3, 2018. Retrieved December 1, 2017.

psu.edu

citeseerx.ist.psu.edu

Schiller, Nicholas (2008). "A Portal to Student Learning: What Instruction Librarians can Learn from Video Game Design". Reference Services Review. 36 (4): 351–365. CiteSeerX 10.1.1.623.999. doi:10.1108/00907320810920333. Archived from the original on September 21, 2013. Retrieved June 25, 2009.

purenintendo.com

"GameSpot's Best of 2007". Pure Nintendo. 2007. Archived from the original on June 12, 2018. Retrieved December 29, 2015.

rockband.com

Baptiste, Sean (February 21, 2008). "Valve Party at GDC + Special Preview of an Upcoming DLC Song". Harmonix. Archived from the original on February 25, 2008. Retrieved February 21, 2008.
Baptiste, Sean. "DLC April 1st! Huge success!". Rockband.com forums. Archived from the original on April 2, 2008. Retrieved March 31, 2008.

rockpapershotgun.com

Peel, Jeremy (March 1, 2023). "'The narrative had to be baked into the corridors': Marc Laidlaw on writing Half-Life". Rock, Paper, Shotgun. Archived from the original on March 2, 2023. Retrieved March 3, 2023.
Walker, John (October 31, 2007). "RPS Interview: Valve's Erik Wolpaw". Rock Paper Shotgun. Archived from the original on February 28, 2021. Retrieved October 31, 2007.
Todd, Hamish (September 20, 2013). "Untold Riches: An Analysis Of Portal's Level Design". Rock Paper Shotgun. Archived from the original on September 21, 2013. Retrieved September 20, 2013.

screenrant.com

"8 Exciting Upcoming Projects J.J. Abrams Is Producing". Screen Rant. May 23, 2022. Archived from the original on July 8, 2023. Retrieved July 8, 2023.

shacknews.com

Faylor, Chris (March 3, 2010). "Portal Mystery Deepens with Second Update". Shacknews. Archived from the original on March 5, 2010. Retrieved March 3, 2010.
Faylor, Chris (February 23, 2008). "GDC 08: Portal Creators on Writing, Multiplayer, Government Interrogation Techniques". Shacknews. Archived from the original on August 14, 2009. Retrieved February 23, 2008.
Faylor, Chris (March 31, 2008). "'Still Alive' Hits Rock Band X360 Tomorrow for Free, PlayStation 3 Edition Due Mid-April". Shacknews. Archived from the original on April 2, 2008. Retrieved March 31, 2008.
Faylor, Chris (October 16, 2008). "Portal: Still Alive Hits Xbox Live Arcade Next Wed; Promises Cake and Companionship". Shacknews. Archived from the original on October 17, 2008. Retrieved October 16, 2008.
Faylor, Chris (July 14, 2008). "Portal: Still Alive Coming Exclusively to Xbox 360". Shacknews. Archived from the original on July 15, 2008. Retrieved July 14, 2008.
Shack Staff (January 4, 2008). "Game of the Year Awards 2007". Shacknews. Archived from the original on February 4, 2009. Retrieved January 31, 2008.
Leahy, Brian (March 1, 2010). "Portal Patch Adds Morse Code, Achievement – Portal 2 Speculation Begins". Shacknews. Archived from the original on March 3, 2010. Retrieved March 2, 2010.
Breckon, Nick (May 5, 2008). "Flash Version of Portal Converted to Actual Map Pack". Shacknews. Archived from the original on October 29, 2010. Retrieved May 5, 2008.

si.edu

americanart.si.edu

"The Art of Video Games Exhibition Checklist" (PDF). Smithsonian American Art Museum. Smithsonian Institution. April 5, 2012. p. 12. Archived from the original (PDF) on May 12, 2012. Retrieved May 19, 2015.

steampowered.com

store.steampowered.com

"Portal". Steam. Valve. Archived from the original on August 10, 2010. Retrieved August 11, 2010.
"Introducing the Steam Music Player". Steam. Valve. Archived from the original on October 29, 2014. Retrieved October 3, 2014.
"Valve and NVIDIA Offer Portal: First Slice Free to GeForce Users". Steam. Valve. January 9, 2008. Archived from the original on July 16, 2010. Retrieved August 11, 2010.
"Everyday Shooter Makes PC Debut on Steam Today". Valve. May 8, 2008. Archived from the original on September 21, 2008. Retrieved May 15, 2008. In other Steam news, Portal: First Slice – the official demo for the title named Game of the Year by over 30 publications – is now available for free to all gamers via Steam.

steampowered.com

"Steam Updates: Friday, November 9, 2007". Valve. November 9, 2007. Archived from the original on November 11, 2007. Retrieved November 9, 2007.

techspot.com

"This Portal demake runs on actual Nintendo 64 hardware". May 16, 2022. Archived from the original on May 16, 2022. Retrieved September 7, 2022.

tegrazone.com

Paul, Jason (May 12, 2014). "The Greatest PC Games of All-Time – Half-Life 2 and Portal – Now Available on SHIELD". NVIDIA Corporation. TegraZone. Archived from the original on October 16, 2014. Retrieved October 11, 2014.

thinkingwithportals.com

"Thinking With Portals". ThinkingWithPortals.com. Archived from the original on August 30, 2015. Retrieved June 21, 2008.

time.com

techland.time.com

"All-TIME 100 Video Games". Time. Time Inc. November 15, 2012. Archived from the original on November 16, 2012. Retrieved November 15, 2012.

usatoday.com

content.usatoday.com

Toppo, Greg (September 19, 2011). "Valve teams with White House in digital learning program". USA Today. Archived from the original on September 21, 2011. Retrieved September 20, 2011.

valvesoftware.com

store.valvesoftware.com

"The Orange Box Original Soundtrack". Valve. Archived from the original on December 25, 2007. Retrieved January 31, 2008.

videogameschronicle.com

Middler, Jordan (September 20, 2022). "Nvidia is bringing ray-tracing to Portal with an RTX version". Video Games Chronicle. Archived from the original on September 20, 2022. Retrieved September 20, 2022.

wccftech.com

"This N64 Portal Demake Running on Real Hardware is Looking Promising". May 17, 2022. Archived from the original on May 17, 2022. Retrieved September 7, 2022.

web.archive.org

"Portal". Steam. Valve. Archived from the original on August 10, 2010. Retrieved August 11, 2010.
Paul, Jason (May 12, 2014). "The Greatest PC Games of All-Time – Half-Life 2 and Portal – Now Available on SHIELD". NVIDIA Corporation. TegraZone. Archived from the original on October 16, 2014. Retrieved October 11, 2014.
"Portal". Google Apps. May 12, 2014. Archived from the original on May 13, 2014. Retrieved May 13, 2014.
Alessi, Jeremy (August 26, 2008). "Games Demystified: Portal". Gamasutra. Archived from the original on August 7, 2010. Retrieved August 28, 2008.
Ocampo, Jason (July 13, 2006). "Half-Life 2: Episode Two — The Return of Team Fortress 2 and Other Surprises". GameSpot. Archived from the original on March 23, 2014. Retrieved July 21, 2006.
Craddock, David (October 3, 2007). "Portal: Final Hands-on". IGN. Archived from the original on April 15, 2011. Retrieved October 5, 2007.
Bramwell, Tom (May 15, 2007). "Portal: First Impressions". Eurogamer. Archived from the original on October 28, 2007. Retrieved October 5, 2007.
Francis, Tom (May 9, 2007). "PC Preview: Portal— PC Gamer Magazine". ComputerAndVideoGames.com. Archived from the original on June 12, 2010. Retrieved October 5, 2007.
Esposito, Joey (April 8, 2011). "Portal 2: Lab Rat – Part 1". IGN. Archived from the original on April 10, 2011. Retrieved April 11, 2011.
Esposito, Joey (April 11, 2011). "Read Portal 2: Lab Rat – Part 2". IGN. Archived from the original on April 13, 2011. Retrieved April 11, 2011.
VanBurkleo, Meagan (March 24, 2010). "Aperture Science: A History". Game Informer. Archived from the original on March 27, 2010. Retrieved March 24, 2010.
"Aperture Science Web Site (login: cjohnson password: tier3)". Valve. Archived from the original on September 17, 2010. Retrieved November 22, 2009.
Reeves, Ben (March 10, 2010). "Exploring Portal's Creation And Its Ties To Half-Life 2". Game Informer. Archived from the original on March 14, 2010. Retrieved March 10, 2010.
Stanton, Rich (April 26, 2011). "Erik Wolpaw on Portal 2's ending: "the [spoiler] is probably lurking out there somewhere"". PC Gamer. Archived from the original on April 30, 2011. Retrieved April 26, 2011.
Elliot, Shawn (October 10, 2007). "Portal (PC)". 1UP. Archived from the original on June 25, 2012. Retrieved August 3, 2008.
Accardo, Sal (October 9, 2007). "Portal (PC)". GameSpy. Archived from the original on January 5, 2011. Retrieved February 25, 2008.
Bradwell, Tom (October 10, 2007). "Portal". Eurogamer. Archived from the original on August 10, 2011. Retrieved February 25, 2008.
Adams, Dan (October 9, 2007). "Portal Review". IGN. Archived from the original on March 10, 2011. Retrieved February 25, 2008.
Montfort, Nick (2009). "Portal of Ivory, Passage of Horn". In Drew Davidson; et al. (eds.). Well Played 1.0: Video Game, Value and Meaning. ETC Press. ISBN 978-0-557-06975-0. Archived from the original on January 8, 2010. Retrieved January 17, 2010.
Faylor, Chris (March 3, 2010). "Portal Mystery Deepens with Second Update". Shacknews. Archived from the original on March 5, 2010. Retrieved March 3, 2010.
Geoff, Keighley (March 1, 2008). "GameTrailers Episode 106". GameTrailers.com. Archived from the original on March 5, 2008. Retrieved March 25, 2008.
Coulton, Jonathan (October 15, 2007). "Portal: The Skinny". Jonathan Coulton's blog. Archived from the original on August 30, 2015. Retrieved November 1, 2007.
"Things are heating up!". Narbacular Drop official site. July 17, 2006. Archived from the original on September 28, 2007. Retrieved July 21, 2006.
Berghammer, Billy (August 25, 2006). "GC 06:Valve's Doug Lombardi Talks Half-Life 2 Happenings". Game Informer. Archived from the original on October 2, 2007. Retrieved September 27, 2007.
Dudley, Breir (April 17, 2011). "'Portal' backstory a real Cinderella tale". Seattle Times. Archived from the original on April 20, 2011. Retrieved April 17, 2011.
Pratt (September 30, 2007). "Pratt and Chief interview the Portal team at VALVe headquarters". Planet Half-Life. Archived from the original on January 15, 2008. Retrieved February 7, 2008.
Faylor, Chris (February 23, 2008). "GDC 08: Portal Creators on Writing, Multiplayer, Government Interrogation Techniques". Shacknews. Archived from the original on August 14, 2009. Retrieved February 23, 2008.
Roberts, Samuel (October 10, 2017). "Valve reflects on The Orange Box, ten years later". PC Gamer. Archived from the original on October 10, 2017. Retrieved October 10, 2017.
Leone, Matt (September 8, 2006). "Portal Preview". 1UP.com. Archived from the original on September 27, 2007. Retrieved September 11, 2006.
Peel, Jeremy (March 1, 2023). "'The narrative had to be baked into the corridors': Marc Laidlaw on writing Half-Life". Rock, Paper, Shotgun. Archived from the original on March 2, 2023. Retrieved March 3, 2023.
Walker, John (October 31, 2007). "RPS Interview: Valve's Erik Wolpaw". Rock Paper Shotgun. Archived from the original on February 28, 2021. Retrieved October 31, 2007.
Pinchefsky, Carol (June 26, 2012). "Kim Swift, Creator of 'Portal,' Discusses Her Latest Game, 'Quantum Conundrum'". Forbes. Archived from the original on June 29, 2012. Retrieved June 26, 2012.
McWhertor, Michael (February 23, 2008). "Portal Devs Reveal the GLaDOS That Never Was, Inspiration Behind Weighted Companion Cube". Kotaku. Archived from the original on February 26, 2008. Retrieved February 26, 2008.
Graff, Kris (November 2, 2009). "Valve's Writers And The Creative Process". Gamasutra. Archived from the original on November 5, 2009. Retrieved November 2, 2009.
VanBurkleo, Meagan (March 31, 2010). "Let There Be Cake". Game Informer. Archived from the original on April 2, 2010. Retrieved March 31, 2010.
Turi, Tim (September 1, 2012). "Chell Almost Married A Turret In Portal 2". Game Informer. Archived from the original on September 5, 2012. Retrieved September 6, 2012.
Baptiste, Sean (February 21, 2008). "Valve Party at GDC + Special Preview of an Upcoming DLC Song". Harmonix. Archived from the original on February 25, 2008. Retrieved February 21, 2008.
Baptiste, Sean. "DLC April 1st! Huge success!". Rockband.com forums. Archived from the original on April 2, 2008. Retrieved March 31, 2008.
Faylor, Chris (March 31, 2008). "'Still Alive' Hits Rock Band X360 Tomorrow for Free, PlayStation 3 Edition Due Mid-April". Shacknews. Archived from the original on April 2, 2008. Retrieved March 31, 2008.
"The Orange Box Original Soundtrack". Valve. Archived from the original on December 25, 2007. Retrieved January 31, 2008.
Hinkle, David (September 24, 2012). "Portal 2: Songs to Test By (Collectors Edition) out on Oct. 30". Joystiq. Archived from the original on November 25, 2012. Retrieved September 24, 2012.
"Introducing the Steam Music Player". Steam. Valve. Archived from the original on October 29, 2014. Retrieved October 3, 2014.
"The Orange Box (PC)". Metacritic. Archived from the original on August 18, 2009. Retrieved December 27, 2017.
"The Orange Box (Xbox 360)". Metacritic. Archived from the original on August 18, 2009. Retrieved December 27, 2017.
"The Orange Box (PS3)". Metacritic. Archived from the original on August 18, 2009. Retrieved February 25, 2008.
Kiestmann, Ludwig (March 6, 2008). "Individual Orange Box games hit retail April 9". Joystiq. Archived from the original on March 6, 2008. Retrieved March 6, 2008.
"Valve and NVIDIA Offer Portal: First Slice Free to GeForce Users". Steam. Valve. January 9, 2008. Archived from the original on July 16, 2010. Retrieved August 11, 2010.
"Everyday Shooter Makes PC Debut on Steam Today". Valve. May 8, 2008. Archived from the original on September 21, 2008. Retrieved May 15, 2008. In other Steam news, Portal: First Slice – the official demo for the title named Game of the Year by over 30 publications – is now available for free to all gamers via Steam.
Hollister, Sean (April 29, 2010). "Steam for Mac Opens a Portal to May 12, steps through". Engadget. Archived from the original on May 3, 2010. Retrieved May 11, 2010.
Caolli, Eric (May 12, 2010). "Steam Launched For Mac, Portal Offered For Free". Gamasutra. Archived from the original on May 13, 2010. Retrieved May 13, 2010.
Remo, Chris (May 19, 2010). "Portal Racks Up 1.5M Free Downloads On PC, Mac". Gamasutra. Archived from the original on May 21, 2010. Retrieved May 19, 2010.
Purchase, Robert (September 16, 2011). "Portal free on Steam until 20th Sept". Eurogamer. Archived from the original on September 23, 2011. Retrieved September 16, 2011.
"Learn With Portals". learningwithportals.com. Valve. September 15, 2011. Archived from the original on October 6, 2011. Retrieved April 27, 2014.
Kuchera, Ben (September 16, 2011). "Portal is used to teach science as Valve gives game away for limited time". Ars Technica. Archived from the original on September 23, 2011. Retrieved September 16, 2011.
Toppo, Greg (September 19, 2011). "Valve teams with White House in digital learning program". USA Today. Archived from the original on September 21, 2011. Retrieved September 20, 2011.
Faylor, Chris (October 16, 2008). "Portal: Still Alive Hits Xbox Live Arcade Next Wed; Promises Cake and Companionship". Shacknews. Archived from the original on October 17, 2008. Retrieved October 16, 2008.
Faylor, Chris (July 14, 2008). "Portal: Still Alive Coming Exclusively to Xbox 360". Shacknews. Archived from the original on July 15, 2008. Retrieved July 14, 2008.
Remo, Chris (July 20, 2008). "Portal: Still Alive Explained". GameSetWatch. Archived from the original on July 29, 2008. Retrieved July 21, 2008.
Lee, James (April 28, 2008). "Portal was offered to XBLA, but rejected". GamesIndustry.biz. Archived from the original on May 17, 2008. Retrieved June 14, 2008.
"Portal: Still Alive (xbox360: 2008)". Metacritic. Archived from the original on October 25, 2008. Retrieved October 27, 2008.
"IGN's Top 10 Xbox Live Arcade Games". IGN. May 7, 2009. Archived from the original on April 13, 2012. Retrieved August 7, 2009.
"The Top 25 Xbox Live Arcade Games". IGN. September 16, 2010. Archived from the original on September 18, 2010. Retrieved September 16, 2010.
Paul, Jason (March 25, 2014). "What's in the Box? Portal – Valve's Popular PC Title – Coming to SHIELD". Nvidia. Archived from the original on June 5, 2014. Retrieved May 27, 2014.
Tach, Dave (May 26, 2014). "Why Nvidia created its own hardware platform and started developing games". Polygon. Vox Media. Archived from the original on May 27, 2014. Retrieved May 27, 2014.
Carpenter, Nicole (February 9, 2022). "Portal and Portal 2 coming to Nintendo Switch". Polygon. Archived from the original on February 9, 2022. Retrieved February 9, 2022.
Phillips, Tom (February 9, 2022). "Portal and Portal 2 coming to Nintendo Switch". Eurogamer. Archived from the original on February 9, 2022. Retrieved February 9, 2022.
Middler, Jordan (September 20, 2022). "Nvidia is bringing ray-tracing to Portal with an RTX version". Video Games Chronicle. Archived from the original on September 20, 2022. Retrieved September 20, 2022.
"Portal (pc: 2007): Reviews". Metacritic. Archived from the original on August 28, 2011. Retrieved October 22, 2007.
"Portal: Still Alive for Xbox 360 Reviews". Metacritic. Fandom. Archived from the original on August 17, 2010. Retrieved April 10, 2022.
"Portal with RTX for PC Reviews". Metacritic. Fandom. Archived from the original on February 2, 2023. Retrieved December 16, 2022.
Keil, Matt. "G4 Review — The Orange Box". G4TV. Archived from the original on November 3, 2012. Retrieved October 19, 2007.
Reed, Kristen (October 10, 2007). "The Orange Box". Eurogamer. Archived from the original on October 26, 2007. Retrieved February 14, 2008.
McGarvey, Sterline (October 10, 2007). "The Orange Box (X360)". GameSpy. Archived from the original on January 19, 2008. Retrieved February 14, 2008.
Adams, Dan. "IGN: Portal Review". IGN. Archived from the original on March 11, 2011. Retrieved October 19, 2007.
Rose, Mike (April 20, 2011). "Portal Sells 4 Million Excluding Steam Sale". Gamasutra. Archived from the original on April 24, 2011. Retrieved April 20, 2011.
Alexander, Leigh (December 19, 2007). "Gamasutra's Best Of 2007: Top 5 Poignant Game Moments". Gamasutra. Archived from the original on December 21, 2007. Retrieved December 19, 2007.
Jetlogs (October 29, 2007). "Companion Cube Plushie Sewing Pattern". Jetlogs. Archived from the original on February 13, 2008. Retrieved January 31, 2008.
Jetlogs (October 14, 2007). "Portal: Weighted Companion Cube Papercraft". Jetlogs. Archived from the original on February 4, 2008. Retrieved January 31, 2008.
Persson, Magnus (January 28, 2008). "Weighted Companion Cube PC case mods". Bit-tech.net. Archived from the original on February 14, 2008. Retrieved February 25, 2008.
Lizzie (January 1, 2008). "How to Make a Weighted Companion Cube Cake". Archived from the original on August 13, 2011. Retrieved February 7, 2008.
de Marco, Flynn (October 21, 2007). "The Weighted Companion Cube Cake". Kotaku. Archived from the original on February 2, 2008. Retrieved January 31, 2008.
Cavali, Earnest (January 21, 2009). "Fan Crafts Gorgeous Replica Portal Gun". Wired. Archived from the original on May 2, 2009. Retrieved May 20, 2010.
"Winners of X-Play Best of 2007 Awards Announced—BioShock is Video Game of the Year". G4TV. December 17, 2007. Archived from the original on January 13, 2012. Retrieved January 31, 2008.
Neuls, Johnathan (November 12, 2007). "Valve to sell official Weighted Companion Cube plushies". Ars Technica. Archived from the original on April 19, 2008. Retrieved April 18, 2008.
Kurchera, Ben (January 2, 2008). "Kiss Me, Kill Me, Thrill Me: ups and downs in gaming 2007". Ars Technica. Archived from the original on August 29, 2015. Retrieved April 18, 2008.
"The Orange Box - Zero Punctuation Video Gallery - The Escapist". The Escapist. Archived from the original on October 6, 2014. Retrieved October 6, 2014.
Johnson, Daniel (June 1, 2009). "Column: 'Lingua Franca' – Portal and the Deconstruction of the Institution". GameSetWatch. Archived from the original on June 5, 2009. Retrieved June 1, 2009.
Goldman, Tom (August 22, 2010). "College Professor Requires Students to Study Portal". The Escapist. Archived from the original on August 25, 2010. Retrieved August 22, 2010.
Klepek, Patrick (May 18, 2011). "Intro to GLaDOS 101: A Professor's Decision to Teach Portal". Giant Bomb. Archived from the original on May 21, 2011. Retrieved May 18, 2011.
Schiller, Nicholas (2008). "A Portal to Student Learning: What Instruction Librarians can Learn from Video Game Design". Reference Services Review. 36 (4): 351–365. CiteSeerX 10.1.1.623.999. doi:10.1108/00907320810920333. Archived from the original on September 21, 2013. Retrieved June 25, 2009.
Todd, Hamish (September 20, 2013). "Untold Riches: An Analysis Of Portal's Level Design". Rock Paper Shotgun. Archived from the original on September 21, 2013. Retrieved September 20, 2013.
"The Art of Video Games Exhibition Checklist" (PDF). Smithsonian American Art Museum. Smithsonian Institution. April 5, 2012. p. 12. Archived from the original (PDF) on May 12, 2012. Retrieved May 19, 2015.
Polygon Staff (November 27, 2017). "The 500 Best Video Games of All Time". Polygon.com. Archived from the original on March 3, 2018. Retrieved December 1, 2017.
"Top 100 Video Games of All Time". IGN. 2018. Archived from the original on June 14, 2018. Retrieved June 15, 2018.
"D.I.C.E. Awards By Video Game Details The Orange Box: Portal". interactive.org. Academy of Interactive Arts & Sciences. Archived from the original on November 13, 2023. Retrieved November 13, 2023.
"D.I.C.E. Awards By Video Game Details The Orange Box". interactive.org. Academy of Interactive Arts & Sciences. Archived from the original on November 13, 2023. Retrieved November 13, 2023.
"Portal BioShocks GDC Awards". GameSpot. Archived from the original on January 4, 2012. Retrieved February 21, 2008.
"IGN Best of 2007: PC Best Puzzle Game". IGN. Archived from the original on October 16, 2013. Retrieved April 27, 2014.
"IGN Best of 2007: Xbox 360 – Best Puzzle Game". IGN. Archived from the original on June 14, 2012. Retrieved April 27, 2014.
"IGN Best of 2007: PC — Most Innovative Design". IGN. Archived from the original on October 16, 2013. Retrieved April 27, 2014.
"IGN Best of 2007: Xbox 360 – Best End Credit Song". IGN. Archived from the original on February 26, 2012. Retrieved April 27, 2014.
"IGN Best of 2007: Overall — Best Puzzle Game". IGN. Archived from the original on November 12, 2013. Retrieved April 27, 2014.
"IGN Best of 2007: Overall — Most Innovative Design". IGN. Archived from the original on November 12, 2013. Retrieved April 27, 2014.
"GameSpot's Best of 2007: Best Puzzle Game Genre Awards". GameSpot. Archived from the original on June 24, 2018. Retrieved February 18, 2008.
"GameSpot's Best of 2007: Best New Character(s) Special Achievement". GameSpot. Archived from the original on January 28, 2012. Retrieved February 18, 2008.
"GameSpot's Best of 2007". Pure Nintendo. 2007. Archived from the original on June 12, 2018. Retrieved December 29, 2015.
"2007 1UP Network Editorial Awards from 1UP.com". 1UP.com. Archived from the original on February 26, 2009. Retrieved February 18, 2008.
The GamePros (December 27, 2007). "GamePro Editors' Choice *2007* (Pg. 2/5)". GamePro. Archived from the original on December 31, 2007. Retrieved February 18, 2008.
Kietzmann, Ludwig (January 1, 2008). "Joystiq's Top 10 of 2007: Portal". Joystiq. Archived from the original on October 27, 2012. Retrieved February 18, 2008.
"Game of the Year". Good Game Stories. December 12, 2007. Archived from the original on January 7, 2012. Retrieved January 31, 2008.
Shack Staff (January 4, 2008). "Game of the Year Awards 2007". Shacknews. Archived from the original on February 4, 2009. Retrieved January 31, 2008.
"X-Play Best of 2007: Most Original Game". G4. December 18, 2007. Archived from the original on May 9, 2018. Retrieved February 25, 2008.
"OXM's 2007 Game of the Year Awards". Official Xbox Magazine. March 17, 2008. Archived from the original on October 10, 2014. Retrieved March 21, 2008.
"GameSpy's Game of the Year 2007: Special Awards". GameSpy. Archived from the original on October 29, 2013. Retrieved April 27, 2014.
Dahlen, Chris; Mastrapa, Gus (December 24, 2007). "A. V. Club Best Games of 2007". A. V. Club. Archived from the original on December 29, 2008. Retrieved April 27, 2014.
"Penny Arcade! We're Right Returns". Penny Arcade. December 28, 2007. Archived from the original on July 17, 2011. Retrieved December 28, 2007.
"Eurogamer's Top 50 Games of 2007". Eurogamer. December 28, 2007. Archived from the original on August 29, 2011. Retrieved January 1, 2008.
"IGN's top 100 villains". IGN. May 14, 2010. Archived from the original on May 18, 2010. Retrieved May 18, 2010.
GamesRadar Staff (February 25, 2015). "The 100 best games ever". GamesRadar. p. 12. Archived from the original on January 15, 2013. Retrieved October 4, 2018.
"All-TIME 100 Video Games". Time. Time Inc. November 15, 2012. Archived from the original on November 16, 2012. Retrieved November 15, 2012.
Kohler, Chris (December 24, 2009). "The 15 Most Influential Games of the Decade". Wired. Archived from the original on March 15, 2014. Retrieved December 24, 2009.
"Steam Updates: Friday, November 9, 2007". Valve. November 9, 2007. Archived from the original on November 11, 2007. Retrieved November 9, 2007.
De Marco, Flynn (December 15, 2007). "Official Plush Weighted Companion Cube Sells Out". Kotaku. Archived from the original on March 4, 2008. Retrieved February 21, 2008.
Davenport, James (October 10, 2017). "'The cake is a lie'—the life and death of Portal's best baked meme". PC Gamer. Archived from the original on October 10, 2017. Retrieved October 10, 2017.
Plunkett, Luke (June 10, 2008). "Casting call reveals Portal 2 details". Kotaku. Archived from the original on June 24, 2008. Retrieved July 18, 2008.
Plunkett, Luke (June 10, 2008). "More details on Portal 2's bad guy". Kotaku. Archived from the original on June 24, 2008. Retrieved July 18, 2008.
Webster, Andrew (March 5, 2010). "Portal 2 is official, first image inside". Ars Technica. Archived from the original on March 7, 2010. Retrieved March 5, 2010.
Leahy, Brian (March 1, 2010). "Portal Patch Adds Morse Code, Achievement – Portal 2 Speculation Begins". Shacknews. Archived from the original on March 3, 2010. Retrieved March 2, 2010.
Mastrapa, Gus (March 2, 2010). "Geeky Clues Suggest Portal Sequel Is Coming". Wired. Archived from the original on March 3, 2010. Retrieved March 2, 2010.
Gaskill, Jake (March 3, 2010). "Rumor: Valve To Make Portal 2 Announcement During GDC 2010". X-Play. Archived from the original on January 8, 2018. Retrieved March 3, 2010.
Zitron, Ed (January 5, 2008). "Portal Maps Investigated". CVG. Archived from the original on January 7, 2008. Retrieved January 5, 2008.
"Thinking With Portals". ThinkingWithPortals.com. Archived from the original on August 30, 2015. Retrieved June 21, 2008.
Peckham, Matt (October 11, 2007). "Portal: The Flash Version". PC World. Archived from the original on April 24, 2011. Retrieved May 5, 2008.
Breckon, Nick (May 5, 2008). "Flash Version of Portal Converted to Actual Map Pack". Shacknews. Archived from the original on October 29, 2010. Retrieved May 5, 2008.
Cavalli, Earnest (October 8, 2008). "Portal: Prelude Now Available". Wired. Archived from the original on October 9, 2008. Retrieved October 9, 2008.
Phillips, John (September 22, 2009). "Portal: Prelude". GameSpy. Archived from the original on December 23, 2008. Retrieved December 18, 2008.
Plunkett, Luke (July 8, 2009). "It's Portal, Running In ASCII". Kotaku. Archived from the original on July 12, 2009. Retrieved July 16, 2009.
Larson, Joseph (January 12, 2011). "ASCIIportal | Cymonsgames". Joseph Larson. Archived from the original on December 29, 2010. Retrieved January 12, 2011.
Spenser, Spanner (July 15, 2009). "Valve's Portal opened on the iPhone". Pocket Gamer. Archived from the original on July 18, 2009. Retrieved July 16, 2009.
Boyer, Brandon (July 16, 2009). "Chell's bells: Portal on the iPhone". Boing Boing Offworld. Archived from the original on October 29, 2013. Retrieved July 17, 2009.
McWhertor, Michael (August 29, 2011). "Mari0 Is What Happens When Mario Gets a Portal Gun". Kotaku. Archived from the original on February 11, 2017. Retrieved February 10, 2017.
"Random: Portal 64 Demake Shows Portal Running on "Real N64 Hardware"". May 15, 2022. Archived from the original on May 15, 2022. Retrieved September 7, 2022.
"Portal Ported: Fan Remakes Valve's Classic Puzzle Game for Nintendo 64". May 16, 2022. Archived from the original on May 16, 2022. Retrieved September 7, 2022.
"This Portal demake runs on actual Nintendo 64 hardware". May 16, 2022. Archived from the original on May 16, 2022. Retrieved September 7, 2022.
"Somehow, the N64 Can do Portal". May 16, 2022. Archived from the original on May 16, 2022. Retrieved September 7, 2022.
"Portal 'Demake' Will Find a Home on the Nintendo 64". May 16, 2022. Archived from the original on May 16, 2022. Retrieved September 7, 2022.
"This N64 Portal Demake Running on Real Hardware is Looking Promising". May 17, 2022. Archived from the original on May 17, 2022. Retrieved September 7, 2022.
"This N64 demake of Portal shouldn't work, but it does". May 18, 2022. Archived from the original on May 18, 2022. Retrieved September 7, 2022.
Stanton, Rich (September 5, 2023). "Legend has spent years making Portal for the N64 and by Gaben he's done it". PC Gamer. Archived from the original on November 20, 2023. Retrieved November 20, 2023.
Bailey, Dustin (January 10, 2024). "After years of supporting mods and fan games, Valve takes action against Team Fortress and Portal fan projects". GamesRadar. Archived from the original on January 11, 2024. Retrieved January 11, 2024.
Bailey, Kat (January 10, 2024). "Team Fortress: Source 2 and Portal 64 Fan Projects Shut Down by Valve Takedowns". IGN. Archived from the original on January 11, 2024. Retrieved January 11, 2024.
Jorgensen, Tom (May 24, 2021). "Portal Movie Still Alive, in Development at Warner Bros., Says Producer JJ Abrams". IGN. Archived from the original on May 24, 2021. Retrieved March 15, 2022.
"8 Exciting Upcoming Projects J.J. Abrams Is Producing". Screen Rant. May 23, 2022. Archived from the original on July 8, 2023. Retrieved July 8, 2023.

wired.com

Cavali, Earnest (January 21, 2009). "Fan Crafts Gorgeous Replica Portal Gun". Wired. Archived from the original on May 2, 2009. Retrieved May 20, 2010.
Kohler, Chris (December 24, 2009). "The 15 Most Influential Games of the Decade". Wired. Archived from the original on March 15, 2014. Retrieved December 24, 2009.
Mastrapa, Gus (March 2, 2010). "Geeky Clues Suggest Portal Sequel Is Coming". Wired. Archived from the original on March 3, 2010. Retrieved March 2, 2010.

blog.wired.com

Cavalli, Earnest (October 8, 2008). "Portal: Prelude Now Available". Wired. Archived from the original on October 9, 2008. Retrieved October 9, 2008.

youtube.com

Portal Problems - Lecture 11 - CS50's Introduction to Game Development 2018. YouTube. CS50. May 4, 2018. Event occurs at 27:45. Archived from the original on December 21, 2021.