I remembered playing a game at a friend's house an extremely long time ago (we're talking years here) and it was very fun. I thought I'd check it out some time but I can't remember what it was called. I do remember that it was a pixellated top-down zombie game where you control a horde and turn other people into zombies. I don't know anything other than this and the design in one of the levels. You started with a few zombies in some jail cells (I think the police locked them in) and you have to get out with a variety of different ways. The only ones I remember are that you could zombify a guard standing outside of a cell or you could detonate one of the zombies which opens all the cells. Also there were angry people with clubs standing outside.