Achievement Dominator: Easy solution
Excuse me my english but I need said this because was a unbelieve discovery.
I have the achievement of Dominator, making the part of quad kills, with ¡1 ONLY GUY!
Scenery: Fates Dam
You can show the granade launcher, and close a room with an armor, if you kill to the guy in a large distance, this revive always in this room. Then I start to shoot him alot of grenades, each time that he revive he death for bomb.
And of this form I have the achievement. You can make this more easy with the powerup of double damage.