Co op mode creates left right letterboxed image/gameplay on my 4K tv.

- My Greatest Co-op Game List:-

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Red Dead Redemption (Multiplayer Online)

Left 4 Dead 2 (Campaign Co-op, Survival Co-op with Multiplayer Versus and other modes)

Left 4 Dead (Campaign Co-op, Survival Co-op with Multiplayer Versus)

Dead Rising 2 (Campaign Co-op modes, alongside with Multiplayer Competitive)

Halo Wars (Campaign Co-op and Multiplayer Competitive)

Gears of War 3 (Campaign Co-op, Horde co-op and Multiplayer Competitive)

Gerars of War 2 (Campaign co-op, Horde co-op and Multiplayer Competitive)

Gears of War 1 (Campaign Co-op and Multiplayer Competitive)

Dead Island (Campaign Co-op and Survival Co-op)

I didn't even think about them having Classes in Gears, but that is the next logical step of gameplay progression.

As long as it has a great 4P co-op campaign & other Co-op modes, it will be great.

I'm still hoping for some Survival co-op mode, but as it stands right now, playing online co-op campaign is a blast.

Borderlands & Borderlands 2 are good, more a co-op than multiplayer but it's still something different and they're both great games.

I think Bioshock 2 has a multiplayer mode, not sure if that's any good though.

Left For Dead & Left For Dead 2 are good multiplayers too, even just running through the levels on co-op is good too.

Mighty Assassin was right Operation Flashpoint Red River.

I had a problem with my first 4k TV. It came in a default 1080P resolution. I wondered why my Xbox could not be put in 4k mode. Once I changed my tv settings my Xbox actually allowed me to switch to 4k mode.