We are beginning to see more and more games that have cross-platform multiplayer features. For example, the upcoming Portal 2's co-op mode will allow PC, Mac and PS3 players to play with each other online. This week the PC and Mac versions of a top down shooter called Guerrilla Bob was released via GamersGate that also has cross-platform options.

The game from developer Angry Mob Games is a cartoony-style shooter that was originally released for the iOS (iPhone, iPad, iPod Touch) and Android mobile platforms. The PC and Mac ports have had a graphical upgrade but more importantly there's cross-platform co-op multiplayer support between the PC, Mac, iOS and Android versions. You can check out a gameplay video showing the cross-platform action after the jump: