The Portal 2 That Could Have BeenImagine a Portal 2 with no GLaDOS, Chell, nor portals. Set in the 1980s. With competitive multiplayer and quantum co-op. And multiple endings. At various points, those were all things that could have hapened, as revealed by Valve last night in San Francisco.
Source: The Portal 2 That Could Have Been (http://feedproxy.google.com/~r/RockPaperShotgun/~3/sgPNtgqfQDE/)