Operation: Harsh Doorstop is the ultimate, free to play, tactical shooter sandbox. Play singleplayer, multiplayer, or co-op modes and explore thousands of community-created maps, weapons, and vehicles via the Steam Workshop. Created by developers of the cancelled Project Reality 2 project.
In the doomsday world of zombies, a tactical team searching for survivors is surrounded by countless zombies and is in a very critical situation. The command center urgently dispatches an AC130 to provide fire cover and assist in the evacuation.