This article is about an achievement. For Halo: Reach's multiplayer level, see Holdout.
Holdout is a Campaign Achievement for Halo 3 and Halo: The Master Chief Collection.
It is earned when one finishes the campaign mission Crow's Nest on the Normal, Heroic, or Legendary difficulty. In Halo: The Master Chief Collection, it is possible to get this achievement on Easy.
The Halo 3 achievement gives 20 Gamerpoints and is represented by a blue plate with a roman numeral II on it.
Note: The player must finish the level completely through from Mission Start, or the achievement won't be unlocked.