You can do this legit or you can boost it easily. Simply start up a ranked game with a objective instead of slayer, and let your opponent score all the times, or you score all the times. Upon completion of the game the achievement will pop for any player who did not die in the ranked match. Alternatively you can try to play a real match, hide in a corner, and hope that no one notices you. Don't forget, dinosaurs are capable of killing you as well.