Prevent all Jackals from regenerating their shields in Operation B, Mission 3
Unlocked: 27 Feb 2015 15:55:41
Complete Operation E, Mission 1 with the Hollow and Black Eye Skulls active
Unlocked: 26 Feb 2015 18:50:43
Extra Credit
10Complete 75 mission specific challenges
Unlocked: 26 Feb 2015 18:40:52
Complete all Operation F mission challenges
Unlocked: 26 Feb 2015 18:40:52
Complete Operation F, Mission 4 with the Blind and Thunderstorm Skulls active
Unlocked: 26 Feb 2015 18:28:54
Silvertip
10Destroy all Mega Turrets with the Grizzly tank in Operation F, Mission 2
Unlocked: 12 Dec 2014 12:46:59
Kill a convoy target with every stationary gun in Operation C, Mission 3
Unlocked: 30 Nov 2014 15:57:24
Brute Force
10Finish the objectives using only the Brute Shot, melee and grenades in Operation D, Mission 1
Unlocked: 30 Nov 2014 15:53:02
Keep all Wolverines intact in Operation A, Mission 3
Unlocked: 29 Nov 2014 17:33:45
Switched Off
10Complete Operation C
Unlocked: 29 Nov 2014 17:27:30
Terminated
10Complete Operation E
Unlocked: 27 Nov 2014 22:09:40
Complete Operation F
Unlocked: 27 Nov 2014 17:34:21
Evacuated
10Complete Operation D
Unlocked: 27 Nov 2014 17:16:44
Foot Soldier
10Finish the objective without using any vehicles/turrets in Operation E, Mission 4
Unlocked: 27 Nov 2014 15:58:15
Switched On
10Complete Operation B
Unlocked: 27 Nov 2014 10:22:40
Overrun
10Complete Operation A
Unlocked: 27 Nov 2014 10:17:19
Skull Combo
10Complete any mission with the maximum number of Skulls active
Unlocked: 27 Nov 2014 07:42:39
Use every armor ability at least once (excluding Overshield and Seeker Drone)
Unlocked: 26 Nov 2014 22:33:34
Recruit
5Earn a star of any type
Unlocked: 26 Nov 2014 22:27:20
Prodigy
5Earn your first Gold star
Unlocked: 26 Nov 2014 22:27:20
117
20Earn all Gold stars
Unlocked: 26 Nov 2014 22:27:20
Pension Plan
10Earn 25000 XP throughout your career
Unlocked: 26 Nov 2014 22:27:20
Tour of Duty
10Earn all Gold stars in Operation F
Unlocked: 26 Nov 2014 22:27:20
Earn all medals in the game at least once
Unlocked: 26 Nov 2014 22:26:04
Score a kill with every handheld weapon (excluding Rocket Launcher and Spartan Laser)
Unlocked: 26 Nov 2014 22:26:04