Dungeon keeper but with immortal redneck play as a complementary aspect; there are DK clones where you can possess monsters, but they lack what immortal redneck has to offer gameplay-wise.

Also a game similar to void bastards but with multiplayer, more monsters, less crafting and more guns, and better/more varied environments, and no time limits. Also immortal redneck with multiplayer. Also ziggurat with multiplayer. Also hands of fate with multiplayer.

Actually forget game, I wish there was a program that could force any game to be multiplayer; or a dev team you could hire that would do that.