Multiplayer first person shooter games for Xbox 360 with 2-player support
America's Army: True Soldiers
Players: 2 local, 16 online
Aliens: Colonial Marines
Players: 2 local, 4 online
Call of Juarez: The Cartel
Players: 0 local, 3 online
Call of Duty: Black Ops 3
Players: 0 local, 4 online
Bodycount
Players: 0 local, 2 online
Painkiller Hell & Damnation
Players: 2 local, 2 online
God Mode
Players: 0 local, 4 online