Portal 2's dedicated community creates maps & mods thanks to Valve's modding support. Popular user-generated content includes single-player and co-op maps for varying challenges. Community favorites ...

Portal 2 accomplished the impossible feat of living up to the monumental expectations set by the original game. The gripping single-player experience introduced new and even more memorable ...

Valve recommends you sit down for this announcement, though you might also want to jump into the air and yell in excitement. If you really like playing Portal 2 co-op, that is (and who doesn't?). The ...