Mutators

Mutators are special conditions added to maps in Co-op Missions rotated on a weekly basis every Monday. They reward players with bonus experience depending on the difficulty. They were introduced in Patch 3.3.0.

Mutator[]

Out of Sight[]

The most frightening monsters are the ones you can't see. Hordes of hidden infested lurk in the shadows, moving inexorably toward the evacuation shuttles. Amon's forces are cloaked as well, and he has deployed an invisible purifier beam against you. Bring detection as well as protection.

This mutation applies to "Miner Evacuation".

We Move Unseen: All enemy units are permanently cloaked.

Purifier Beam: An enemy Purifier Beam moves across the map toward nearby player units.

Overview[]

Mutators are special conditions that bring additional challenge and diversity to existing Co-op Missions. Mutators can vary wildly, from having to fight a completely cloaked army, to dodging lava erupting from the ground. Mutators vary on a weekly basis. Each week, players have the chance to take on a Weekly Mutation where several Mutators are applied to a Co-op Mission. The mutation will be available for seven days with a break before the next one begins. Difficulty levels can still be selected, as can normal Co-op Missions, with the ability to toggle between the two modes.^[1]

Bounties[]

If players complete the weekly mutation, they will be awarded a tiered XP "bounty" bonus based on the difficulty level selected. Completing a weekly mutation on a higher difficulty level will award the cumulative sum of all XP bonuses up to that level. For example, completing the weekly mutation on Hard will award the sum XP bonus of Casual + Normal + Hard.^[2]