DayZ is a multiplayer open-world survival-horror shooter developed and published digitally by Bohemia Interactive for the PC on December 13, 2018. It was originally part of Steam's Early Access program since December 16, 2013 and was later ported to the Xbox One on March 27, 2019. A PlayStation 4 port is in development.
Building on the military simulation aspect of the studio's ArmA series, DayZ takes place in the fictional post-Soviet country of Chernarus during a zombie apocalypse. Each player takes control of a survivor immune to the virus, tasked with fighting over resources as they try to survive in a dangerous wasteland with limited supplies and dangerous obstacles (including zombies, weather, predatory animals, disease, injuries, and other players).
It is is based on the free ArmA II mod of the same name (which was in development since January 21, 2012), with the mod's creator (Dean "Rocket" Hall) as the project lead.