Good online co-op games for xbox 360?

My boyfriend and I play co-op or multiplayer games online together we're looking for some new ones to get any suggestions would be good :) We've played: Left 4 Dead Left 4 Dead 2 Soul Calibur V Resident evil 5 Resident evil ORC Max Payne 3 Gears 1,2,3 Dead rising 2 So we're kinda... show more My boyfriend and I play co-op or multiplayer games online together we're looking for some new ones to get any suggestions would be good :)

We've played:
Left 4 Dead
Left 4 Dead 2
Soul Calibur V
Resident evil 5
Resident evil ORC
Max Payne 3
Gears 1,2,3
Dead rising 2

So we're kinda struggling to think of anything else to get.
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