Vampire

With the vampire mutator, when a player inflicts damage on another player, they gain the same ammount of health that the other player lost. For example, if one player inflicts 100 points of damage on another player they will gain 100 HP. It is generally harder to gain frags with this mutator. Also, snipers have an advantage, because they generally have a good damage dealt to damage received ratio. Attackers are also rewarded by getting more health, which allows them to do more damage and gain more health.