Fear the Pink Mist

Fear the Pink Mist is a Halo 3 Achievement represented by a pink circle with a Needler and five hearts surrounding the weapon. It is awarded for killing five enemies with a Needler, in a ranked, or free-for-all match or Campaign, making it one of the easiest achievements to get. The name of the achievement is a reference to the large pink explosion that occurs when Needler projectiles detonate on a target. It awards the player with five Gamerscore. The achievement can be easily obtained on almost any campaign level.

Trivia

 * "Pink Mist" is also a phrase from the film Jarhead, in which it is used to describe the effects of a headshot on a sniper's target. The target's brains and blood would shoot out of the exit wound on their head, causing a pink/red mist to stay in the air for a few seconds.
 * This is one of the first, and easiest, achievements the player is able to get via campaign.
 * In Halo 3: ODST, the Pink and Deadly achievement is similar to this achievement, but instead of having to kill 5 enemies, the player must kill 10 enemies. They must be killed by the explosion, and they must be within the same level or without dying in Firefight.