If one doesn’t work for you, try the alternative method. There are multiple ways to install DayZ mod. Arma 2: Combined Operations (Arma 2 + Arma 2: Operation Arrowhead).If you encounter any of these issues, follow our step by step guide to install the mod and start playing. It’s still in its alpha phase but has already attracted a huge player-base which continues to grow, but since developers are still testing it, there might be bugs here and there, and you might encounter several installation problems in your attempt to play the mod. It meshes the realistic warfare with the introduction of zombies in a survival of the fittest setting. Arma 2 might have been neglected by the large portion of the shooter community in the past, but the launch of DayZ Mod has changed everything. The DayZ mod, however, has proven me wrong. I was a believer that zombies only belong to the arcade world.