Zombie Apocalypse: Day 91 (HB) By: Marc Stevens Welcome to the end of days! Zombie Apocalypse: Day 91 is a brand-new survival table-top RPG adventure. Using a percentile dice system, players choose their characters, select weapons, and attempt to survive the zombie apocalypse. With character sheets, in depth notes on mechanics and weaponry as well as items and even vehicles, the only limits to your survival is your imagination, and not being the slowest one in your party.