Xbox 360 Action21 out of 49
Clear Campaign Mode.
Xbox 360 Action23 out of 45
Complete mission "Fade To Grey - Hospital"
Xbox 360 Sports8 out of 16
Bringing home the bacon
Unlock Officer Dick
Xbox 360 Action10 out of 50
Continue playing to unlock this secret achievement.
Xbox 360 Action39 out of 50
Hit 10 enemies with your melee attack. (campaign only)
Xbox 360 Driving24 out of 58
Complete the fourth year of Season Play.
Xbox 360 Action11 out of 64
Stop the unstoppable
Xbox 360 Action10 out of 12
Host a multiplayer game for the first time
Xbox 360 Driving14 out of 72
Spike strip a car that is targeting you with an EMP
Xbox 3604 out of 62
Retrieve mineral resources by scanning and probing a planet in the galaxy map
Xbox 36034 out of 75
Reach Level 50
Xbox 360 Action16 out of 44
Birth of a Spartan
Complete every level of the game on Normal difficulty.
Xbox 360 Action44 out of 69
Noble 1 Earn a Double Kill with the shotgun in multiplayer Matchmaking.
Xbox 360 Action1 out of 57
Completed tutorial level on any skill level