The zombie mod for ARMA 2: Combined Operations, DayZ, is now a recognised mod on Steam.
Gamers can now download the DayZ mod via the digital distribution service. The mod requires gamers to own both Arma 2 and the expansion pack Operation Arrowhead; which can be purchased as a pack called Combined Operations. After purchase of Combined Operations the DayZ mod itself is completely free. However, beware that this version will no longer receive updates as the development team are working on a standalone version.
Check out DayZ on Steam now by heading to the mod’s store page.