Conflict Denied Ops - Microsoft Xbox 360

I picked this up used for cheap and was pleasantly surprised by how smooth the split-screen co-op runs—no lag even in the heavier firefights. The weapon customization is basic but lets you tweak things just enough to fit your play style.

The co-op campaign in this is surprisingly solid, and the way you can use your partner for tactical breaches really adds to the action. I've been playing through it with a friend and the gameplay holds up well for a shooter from this era. Definitely worth picking up if you're looking for a fun split

The menu is a bit dated, but the split-screen co-op mode is pure chaos in the best way—my buddy and I spent hours trading off sniper and assault roles. Got the disc in great shape, and it loads fast with no scratches.