Brought to you by the guys who made Castle Crashers and the infamous Alien Hominid, BattleBlock Theater is another co-op game, this time a platformer. Expect more zany, odd humour with fun gameplay.

Castle Crashers is odd. Originally a console exclusive, it's a co-op side scrolling beat-'em-up like in the days of yore, but with modern game design thrown in there. Fun and ridiculously absurd.

Pretty fun when playing with friends. Alone it can be dull, but the same goes for Payday 2 as well.

Terraria is a great experience, alone and with friends. Don't fight too hard over who gets the life crystal though...

An incredibly impressive game for it's time. It nails the pyschological horror while giving the player difficult firefights through a highly co-ordinated AI system.

Half-Life 1, but in co-op. That should be enough to let you know how good this is when played with friends.

Ever wanted to play Half-Life 2 with other people? Neither did we, but it's a lot of fun. Think Sven Co-op but for Half-Life 2.

If you play Venice on settler you are a piece of ♥♥♥♥.