Arma II: DayZ
Arma II: DayZ: co-op, on PC, came out 21 January 2012.
Want to play Arma II: DayZ with friends?
Pick a night together in Lobbli: everyone marks when they are free, and you see which evening works.
Quick answers
Is Arma II: DayZ co-op?
Yes, Arma II: DayZ has a co-op mode.
How many players?
The catalogue does not list a player count yet.
Split screen?
No split screen mode is listed for it.
When did it come out?
21 January 2012.
Which platforms?
PC.
What kind of game is it?
Shooter, Tactical
Who makes it?
Dean "Rocket" Hall
From its Steam page: co-op.
About Arma II: DayZ
DayZ is a multiplayer open world survival horror modification (mod) designed by Dean Hall for the 2009 tactical shooter video game ARMA 2 and its 2010 expansion pack, ARMA 2: Operation Arrowhead. The mod places the player in the fictional post-Soviet state of Chernarus, where an unknown virus has infected most of the population, turning people into violent zombies. As a survivor with limited supplies, the player must scavenge the world for supplies such as food, water, weapons and medicine, while killing or avoiding both zombies and other players, and sometimes non-player characters, in an effort to survive the zombie apocalypse.