Description: Play Mass Mayhem: Zombie Apocalypse Expansion free online game at Friv2015Games.Net. You want more chaos? Here comes Mass Mayhem: Zombie Apocalypse Extension, the bloody expansion to the popular destruction game series. Your mission is simple: clear off all waves of infected undeads using a wide varity of powerful weapons, armor and an ultimate killer bot mech as well. How long can you survive this post-apocalyptic trouble? Much fun.. I wish you happy gaming!