If you expect normal gameplay you will be disappointed.

In general, zombies add a chaotic moment to your base Rimworld experience that changes the game substantially. Try to kite them around or lead them away while another colonist rescues someone. You can use the mechanics to your advantage too.

So when you see that zombies get stuck in a cave or near your base, don't get fooled in underestimating the danger. When they hear, see or smell you they will start following your trail and if one zombie starts to track that way others around it will follow thus resulting in a group behaviour that you would expect from animal packs. There are exceptions though: special zombies (depending on type) are smarter and will find you but the big masses just wander around. Zombies are dumb, get stuck and in general slowly radiate towards your base than to attack it. With zombies in Zombieland you won't get the normal planing and attacking behaviour like with other mods. Therefore, you cannot select or harvest them. Most default RimWorld functions have been disabled on them to allow for a smooth game play experience. This Mod features custom controlled Zombies with simulated instincts. Shoot them and they keep going, kill them and they respawn. There are rumors of maps with well over one thousand zombies. They do not discriminate and attack your animals, your enemies and even traders.

Zombies attack anything that moves, smells and makes sounds. In Zombieland, Zombies are everywhere! They crawl out of the ground in masses, hunt you down, bash your doors and eat you alive! At night, their blood lust will steer them towards your base. Because this mod will give you the Heebie-jeebies! Do you like The Walking Dead? Are you afraid of The Undead? Good.

Rimworld zombie apocalypse mod