One Spartan Army
Kill 100 enemies in Firefight Matchmaking.
2000cR
Cannon Fodder
Kill 50 infantry-class foes in the Campaign today.
1000cR
Flat Tire
Kill 10 enemy vehicles in Firefight Matchmaking.
2343cR
Iron Will
Complete a Campaign mission alone on Heroic or harder with the Iron Skull on.
2500cR