DayZ is a multiplayer open world survival horror mod for the 2009 video game ARMA II and its 2010 expansion pack, ARMA 2: Operation Arrowhead. It has been widely praised in the game media for its innovative design elements, with Kotaku and Eurogamer describing it as possibly one of the best zombie games ever made, PCGamer saying it was one of the most important things to happen to PC Gaming in 2012, and IGN calling it one of the most popular PC Games in the world four months after release.
This mod is so awesome it was responsible for putting the three year old ARMA 2 into the top seller charts on Steam for over seven weeks, and is responsible for over 300,000 unit sales within two months of its release. Designer Dean Hall stated in an interview withVG247 that a standalone game will be out in 2012. In its first four months the mod reached one million players on 6 August 2012.