Breaking Quarantine (achievement)

Breaking Quarantine is an achievement in Halo: Combat Evolved Anniversary that is awarded for escaping the Flood containment facility on the level 343 Guilty Spark in at most 21 minutes. It is worth 25 Gamerscore points.

It is represented by a white outline of an analog clock with the number "21" beside it on top of a green octagon.

Trivia

 * The name of the achievement may be a reference to the story Breaking Quarantine from the Halo Graphic Novel.
 * The fact that the player must escape the facility within twenty-one minutes is a reference to the number seven, as 21÷3=7.