Multiplayer first person shooter games for Xbox with 2-player online support
Delta Force: Black Hawk Down
Players: 2 local, 4 online
Serious Sam 2
Players: 0 local, 4 online
Conflict Global Terror
Players: 4 local, 4 online
Tom Clancy's Ghost Recon: Advanced Warfighter
Players: 2 local, 2 online
DOOM 3 (Limited Collector's Edition)
Players: 4 local, 2 online