Okay, so once monsters become more moddable, or NPCs are more feasible, how about a mode where you’re just a guy, high on crystal meth, fighting off normal people? Instead of zombies, people. Instead of cop zombies, people. Of course, they’d basically be dumb cannon fodder, atleast generic “Human”. Cops could always have guns and be able to shoot you.
Oh, sure, since it’s the zombie apocalypse, there’s no morale quirks or reasons not to break into people’s house. But with but just a few superficial changes, this could be the burglary and murder roguelike the game. But perhaps I’m depraved and there’s no audience for that sort of thing, but it’d be a fun kind of compromise between Liberal Crime Squad and that hoax Serial Killer roguelike.