A decent game that could be A LOT better. It starts out fine, until the difficulty rises. Once you get to a certain point, the zombie generator or whatever its called has stupidly annoying high hit points with inadequate ammo drops. The locked weapons don't unlock soon enough, which leads to getting good enough at the game to kill all the enemies and be bored as shit once you run out of ammo and hack and slash at the generators for what seems like an eternity. Enjoy it on easy mode, because once you start harder modes the game really shows it's flaws.