Raven Squad should be on store shelves today for the Xbox 360 and PC. The game features two player online co-op in an 80's inspired jungle war. The unique feature the game provides is the ability to switch seamlessly between an RTS style viewpoint and a first person viewpoint. This should make for some interesting cooperative strategy!
The game is available right now on Amazon for $47 on the 360 and $40 on the PC.