Left 4 Rats

Pretty much a Left 4 Dead clone but does enough different to stand on its own. I do think there is an interesting discussion to be had about which is preferable: L4D with not xp or loot progression vs Vermintide with the progression system but the only thing that does is make numbers bigger for both you and the vermin so ultimately the gameplay loop is largely unchanged. I prefer L4D, but if you like seeing numbers get bigger (which very much plays into human psychology) maybe this is for you.