a Coop mission pack for ArmA 2 called Operation Deadhouse.
It is available for Co-op as well as single player!
You are the leader of a 10 man USMC squad. This mission pack takes you through the invasion of Chernarus up the west side, paralleling the SP campaign Harvest Red, with some slight variations.
Four missions for the campaign I stopped making. The end of the fourth mission is a fairly good ending point for a "short" campaign.