Zombie

Three broad sorts: defence games where you fortify against waves, driving games where you get through them, and shooters where you take them head on. They all share the endless-enemy premise but play very differently.

Zombie Horde: Build & Survive. The building phase between waves is the real game, and how well you spend it determines whether the next wave is manageable or the end of the run.

A defence game with merging built into it. Rather than simply placing more units you combine existing ones into stronger versions, so board space and timing matter as much as how much you can afford.

Yes. Zombie Derby is a driving game where the horde is terrain rather than targets, and the defence games are more about placement and resources than aiming at anything.

It varies, and several are deliberately cartoonish rather than graphic. If you'd rather avoid gore entirely, the No Blood games tag filters specifically for that across the whole site.