Arma 2 is an open world, military simulation video game developed and published by. If youre using dayz commander, enable the beta patch from the settings. I have updated both arma 2 to 103718 and dayz epoch to the latest version. Hall released dayz, an open world survival horror modification for arma 2 which also required the operation arrowhead standalone expansion pack to work. Combined operations operation arrowhead reinforcements from 1. Well, with a renewed interest in arma 2 that thing you bought so you could play dayz, bohemia interactive has released the 1. Operation arrowhead beta, and launch dayz with the beta. I serisously need some help, i just got the arma combined ops and downloaded dayz commander and installed the dayz mod via steam. Im guessing so as all the servers and clients will be 1. Combined operations operation arrowhead reinforcements 1.