Zombie Survival Role Playing Game
Second Edition Rulebook - Pocket Edition
From the book:
In this game, one player takes the role of the Gamemaster (GM), who runs the elements of the scenario. The remaining players are the Survivors, those who are thrust into the events of the outbreak, trying their best to live day to day.
Outbreak: Undead - Zombie Survival Role Playing Game is a game of Survival Horror.