And it's not just a precursor to friendslop--Portal 2 also predates the mini-renaissance of co-op-only games led by Hazelight ...

GameSpot may get a commission from retail offers. According to GLaDOS, Portal 2's dry-witted antagonist, scientific achievement is all about cooperation. That's why one of history's greatest ...

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 ...

Portal Reloaded co-op is here, as the astounding Portal 2 mod that introduces a time travel portal to the Valve puzzle game gets an update years down the line. While Portal 3 feels as far off as a ...

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 ...

All the Latest Game Footage and Images from Portal 2: Peer Review Portal 2: Peer Review includes an additional course for Portal 2 co-op campaign, dubbed “Art Therapy”; as well as Challenge Mode for ...

A pair of cute robots star in Valve's team-focused twist on the Portal formula. The single-player campaign's only twice as long? Jesus, that's crap. I realise that it's difficult to weave a cogent ...