|Return to Sender||20|
|Complete "Sidetracked" Co-op map (Online/Offline).|
This is coop story related and cannot be missed. It can be unlock via LIVE or split-screen.
|Rate this achievement||Average Rating (Based on 1 votes)|
|You need to register before being able to post comments.|
|You need to log in or register to use My360Achievements.|
|You need to log in or register to rate games.|
User Score is based on 645 user ratings.