Overrun
Complete Operation A
10 ✓ November 30th, 2013
Skull Combo
Complete any mission with the maximum number of Skulls active
10 ✓ November 30th, 2013
Switched On
Complete Operation B
10 ✓ December 1st, 2013
Switched Off
Complete Operation C
10 ✓ December 7th, 2013
Evacuated
Complete Operation D
10 ✓ December 23rd, 2013
Never Knew What Hit Them
Kill a convoy target with every stationary gun in Operation C, Mission 3
10 ✓ December 2nd, 2013
Recruit
Earn a star of any type
5 ✓ November 30th, 2013
Prodigy
Earn your first Gold star
5 ✓ November 30th, 2013
Weapon of Choice
Score a kill with every handheld weapon (excluding Rocket Launcher and Spartan Laser)
5 ✓ December 7th, 2013
Escort Service
Keep all Wolverines intact in Operation A, Mission 3
5 ✓ November 30th, 2013
117
Earn all Gold stars
20 
Distinguished Service
Earn all medals in the game at least once
15 
Vidmaster Challenge
Complete Operation E, Mission 1 with the Hollow and Black Eye Skulls active
15 
Vidmaster Challenge 2.0
Complete Operation F, Mission 4 with the Blind and Thunderstorm Skulls active
15 
Foot Soldier
Finish the objective without using any vehicles/turrets in Operation E, Mission 4
10 
Pension Plan
Earn 25000 XP throughout your career
10 
Powered by MJOLNIR
Use every armor ability at least once (excluding Overshield and Seeker Drone)
10 
Extra Credit
Complete 75 mission specific challenges
10 
Complete Operation F
Complete Operation F
10 
Silvertip
Destroy all Mega Turrets with the Grizzly tank in Operation F, Mission 2
10 
Tour of Duty
Earn all Gold stars in Operation F
10 
Terminated
Complete Operation E
10 
Nowhere to Hide
Prevent all Jackals from regenerating their shields in Operation B, Mission 3
10 
Brute Force
Finish the objectives using only the Brute Shot, melee and grenades in Operation D, Mission 1
10 
A for Effort
Complete all Operation F mission challenges
5