Ah, free to play games: they really do seem to be taking the world by storm. Sort of like zombies. So it makes sense for a game in which kill horde upon horde of the walking dead to be free to play... or something. Anyway, Zombie HQ is a fairly popular game on iOS, and the developers just dropped an Android version on the Play Store.
Zombie HQ is a game in which you shoot zombies.
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