Portal (video game) (English Wikipedia)

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"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.

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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.
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doi.org

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engadget.com

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eurogamer.net

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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.
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forbes.com

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Alessi, Jeremy (August 26, 2008). "Games Demystified: Portal". Gamasutra. Archived from the original on August 7, 2010. Retrieved August 28, 2008.
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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.
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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.

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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.

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wired.com

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blog.wired.com

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worldcat.org

search.worldcat.org

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youtube.com

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