Marines VS Ninjas is a fan made game mode adapted from Balloon Battle, and was founded by a group of 3 players on February 13 2012. The rules are simple, players with lives are called "Marines" and players without lives are called "Ninjas." Marines try to stay alive as long as possible, and cannot use Widowmaker Turrets, TPC Launchers, or Stealth, and Ninjas can only use melee attacks, their goal is to deplete the lives of all the marines. Marines win by surviving the time limit, and Ninjas win by killing all the marines before the time limit.