Mutation Mode is the battle between the Human and Mutant side - at the start of the round, players will be given 22 seconds to roam around the map and set up any defense necessary to survive the inevitable infection incoming. Once the countdown expires, two or three players will turn into Mutant with high HP but can only use Melee attack - from there, the remanining players must do their best to not get hit by the mutants, or they will be infected and join the rank of the Mutant. Each match will last 5 rounds - Mutants win by infecting all Human, and Human wins by surviving till the end.
After finishing 3 Mutation Mode games, players are able to claim rewards via flipping the Reward Cards (one free, the subsequent flip costs 2,4,8 and 16 gems respectively). The Reward Cards reset daily, although VIP players can buy more turn to flip cards (maximum 3 turns)