Between Zombies and Vault Tec

Living Once? Yeah, you kinda expect for that. Living Twice? Now that's a surprise, you don't see that around, and you wouldn't believe that was the case either. Three times!? Okay, now you gotta be shitting me. Unfortunately for our good friend Adam, life is stranger than fiction, that includes the entire zombie apocalypse hitting his strangely crossover world that he was starting to enjoy. But oh well, it's not like humans actually have anything to fight back against the might of his second world, which has been following him here, more ways than one.