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 ...

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 ...

The Portal Reloaded modification for Portal 2 has today released its Cooperative update bringing in new puzzles to solve in Co-op mode. According to the Steam Page Portal Reloaded is a free, community ...

After repeatedly trying to play Portal 2's co-op and being paired with complete a**holes, I have given up on random matchmaking. If anyone is in the same situation and looking for somebody to play ...

There’s not much I really want to say about this Portal 2 cooperative trailer, an extended cut of what was revealed during PAX. I kind of just want you to watch it. It’s a little under two minutes you ...

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 ...

Whether you’re celebrating Valentine’s Day with a weekend of gaming togetherness or just somebody with a gaming pal looking for a great deal, Steam’s Couch Co-Op Fest — running through Feb. 18 — has a ...