”Left 4 Dead, Team Fortress 2, and Valve”. ign.com. 5 december 2008. http://uk.pc.ign.com/articles/936/936221p1.html. Läst 26 november 2008. ”Yet it also features four distinct survivors who convey an incredible amount of emotion through their facial animations and the rich amount of voice acting. There's Bill, the grizzled old veteran; Francis, the tough biker; Louis, the everyday dude; and Zoey, the college girl. They're so memorable that you can hear their voices in your mind as clear as day”
”Eight Hands-on: Left 4 Dead Impressions”. Rock, Paper, Shotgun. 4 november 2008. http://www.rockpapershotgun.com/2008/11/04/eight-hands-on-left-4-dead-impressions/. Läst 23 november 2008. ”Over breakfast yesterday – before playing – we were talking about different takes on the zombie game that we'd like to see. One which didn't come up is one which Left 4 Dead grasps completely – its inherent perverseness. Now, it's a constant internet thing to discuss what you'd do in a Zombie Invasion, the implication being that you're smarter than anyone else. Which is fine... but that's not how the genre works”
Eddy, Andy (17 november 2008). ”Left 4 Dead Review (Xbox 360)”. Teamxbox. Arkiverad från originalet den 23 mars 2009. https://web.archive.org/web/20090323080021/http://reviews.teamxbox.com/xbox-360/1622/Left-4-Dead/p1/. Läst 18 november 2008. ”The motion-capture animation that makes up the varied zombie behavior is incredibly good, with the visuals peaking when a rushing gray-black mass of zombies are climbing up, over and through the terrain to get at you(...) On the other hand, it's irritating when you come into a room and see an enraged zombie clipping through from the other side of a wall or door”
Eddy, Andy (17 november 2008). ”Left 4 Dead Review (Xbox 360)”. Teamxbox. Arkiverad från originalet den 23 mars 2009. https://web.archive.org/web/20090323080021/http://reviews.teamxbox.com/xbox-360/1622/Left-4-Dead/p1/. Läst 18 november 2008. ”The motion-capture animation that makes up the varied zombie behavior is incredibly good, with the visuals peaking when a rushing gray-black mass of zombies are climbing up, over and through the terrain to get at you(...) On the other hand, it's irritating when you come into a room and see an enraged zombie clipping through from the other side of a wall or door”
