Amazon has a few special's going on for some of this year's biggest co-op releases, which just all so happen to be coming from Electronic Arts and also happen to fall within the next two months. All of the games include a $20 credit on your next Amazon purchase (after the game ships) - and SimCity includes access to this weekend's beta. Just follow the below links and pre-order away!
Army of Two: The Devil's Cartel (360, PS3) - 2 Player Online and 2 Player Local Co-Op
SimCity (PC) - 16 Player Online Co-Op
Dead Space 3 (360, PS3, PC) - 2 Player Online Co-Op