Invasion is for up to four players and is played on deathmatch maps. Random critters from the Unreal series teleport in waves and you have to kill them all. If one guy dies, he's dead until the next round, assuming at least one member survives and kills all the baddies to start the next round.

Mutant starts like any regular deathmatch game. However, the first one to get a kill becomes the mutant. He is invisible, has all of the weapons, has agility, has berserk, and lots of ammo. However, his health slowly drops and the only way to replenish it is to kill others. His position is marked on the hud of the other players. The person that kills the mutant becomes the mutant. Everyone else cannot fight eachother and must fight the mutant. An exception to this is the bottom-feeder option; the person with the lowest score in the game is free to attack anybody at anytime to get points; however, he is not super like the mutant. Once the bottom-feeder has jacked up his score to the point in which he is no longer last, he turns into a normal player and the now-last player becomes the bottom-feeder.