Frustratingly difficult. Maybe a simple easy/hard option that changed the multiplier for zombie damage would be nice. 3/5 because of the difficulty, rest is great.
So I got to 100%, nothing happened, Im guessing thats not added in yet? This game is retarded, and for some reason I couldnt stop playing till I was finished, at 1am.... LOL, so I guess that makes it addicting in a good way :)
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