The full 0.11 version of Battlefield 1861 coop supported. The mod is themed on the events and battles that took place during the American Civil War in the mid-nineteenth century.
This is a different mod than most. The closest thing to an automatic weapon are the revolvers. You have to aim, take 10 seconds to reload and aim again. You have a bayonet or a knife for close-quarters battle. There are no planes and no vehicles.
A small patch to fix the CTD in singleplayer mode.