Turok

This achievement takes into consideration a number of factors such as your kill to death ratio, assists, suicides, and everything else relating to combat. To unlock this achievement just find a weapon that you are comfortable with and make sure you kill more than you die, the achievement is relatively easy and you should unlock it after a few games. It is also possible for this achievement to be boosted with a friend if you join the same player match. The achievement will unlock once the game ends.