Counter-Strike: Global Offensive will be hitting Steam next week, and the Zombie Mod by Plaguefest will be available on day one.
According to the official CS:GO blog, “It was important to us as we developed CS:GO to make sure it was as moddable and extensible as any CS game. So this is just one of the many mods that will be available in the coming months.”
Counter-Strike: Global Offensive will be released on PC, Xbox Live Arcade and PlayStation Network on the 21st August.