Power-up

"Power-ups" give you an advantage over the other players in a multiplayer battle in Halo: Combat Evolved, Halo 2 and Halo 3. On a few occasions, they're can be found in Campaign, except Halo 3.

Trivia

 * The Custom Powerup's default settings increase your speed and melee power. It has been speculated this was to be the effects of a unused Agility Powerup.