Perfection

Perfection is a medal awarded in Halo 3 Multiplayer for winning a slayer game with 15 kills or more without dying or betraying a teammate; as a note, however, you do not need to get a Running Riot, just 15 kills, this is good news if the game selects a new host and has reset your spree (which it does do). It is represented by a black hexagon outlined in Silver, which has another small blue hexagon in the middle. This medal can be obtained in any slayer-based game. One tactic is to camp and stay away from the enemies. When they advance stay out of sight then execute an ambush or assassinate. You can also try to perfect ranged attacks like sniping, or you can just play the game recklessly and hope you get 15 kills without dying. Camping and staying away from enemies can often result in lack of kills, but you are more likely to stay alive for the whole game, so a mix between camping and advancing is good strategy. Perfection is considered one of the hardest medals to achieve.