The following mutators either come with the game or have been added in later bonus packs.

Arena

          Default weapon pickups in a level can be substituted with a single weapon.

Big Head

          Head size depends on ratio of kills to deaths.

 No Orbs

          No Orbs in Warfare.

Friendly Fire

          Friendly fire damages teammates (50 percent of full damage taken).

 Handicap

          Provides armor and weapon bonuses to losing players.

Instagib

          Players are equipped with a one shot kill instagib rifle, and all pickups are removed from the game.

Low Gravity

          Gravity is reduced.

No Hoverboard

          Hoverboard is removed.

No Super Pickups

          Removes all super pickups (Shieldbelt, Power Ups, Megahealth, Redeemer) from the game.

No Translocator

          The Translocator device is removed from the player's inventory.

Slow Mo

          Slows the game down.

Kills Slow Time

          Time slows down for a moment every time you kill an enemy (instant action only).

Speed Freak

          Speeds the game up.

Super Berserk

          Players fire at Berserk speed for the entire match.

Survival

          Spectating players spawn into the match after current players are killed (for the Duel gametype only).

Weapon Replacement

          Default weapon pickups in a level can be substituted with different weapons.

Weapon Respawn

          Weapons respawn instead of always being available. (Obsolete as of 2.0?)

Titans

          Allow players to become Titans.