The Cum Zombie Ending is an ending in Prisoners of the Elder One. It occurs after straying from the glowing path leading to the Elder One's Hideout.
Erik's clothes dissolve, and a bunch of tentacles wrap around him and penetrate him. As days go by, he ends up addicted to the tentacles and their cum. Once the tentacles are done with Erik, he has turned into a mindless zombie, the only remnant of his masculinity being his shriveled penis.