Prevent all Jackals from regenerating their shields in Operation B, Mission 3
Unlocked: 17 Apr 2016 14:37:40
Complete Operation F, Mission 4 with the Blind and Thunderstorm Skulls active
Unlocked: 17 Apr 2016 14:14:44
Skull Combo
10Complete any mission with the maximum number of Skulls active
Unlocked: 17 Apr 2016 14:12:00
Complete Operation E, Mission 1 with the Hollow and Black Eye Skulls active
Unlocked: 17 Apr 2016 14:12:00
Keep all Wolverines intact in Operation A, Mission 3
Unlocked: 17 Apr 2016 00:02:44
Silvertip
10Destroy all Mega Turrets with the Grizzly tank in Operation F, Mission 2
Unlocked: 16 Apr 2016 23:57:31
Foot Soldier
10Finish the objective without using any vehicles/turrets in Operation E, Mission 4
Unlocked: 16 Apr 2016 23:48:58
Brute Force
10Finish the objectives using only the Brute Shot, melee and grenades in Operation D, Mission 1
Unlocked: 16 Apr 2016 23:44:45
Kill a convoy target with every stationary gun in Operation C, Mission 3
Unlocked: 16 Apr 2016 23:37:58
Use every armor ability at least once (excluding Overshield and Seeker Drone)
Unlocked: 16 Apr 2016 23:18:50
Extra Credit
10Complete 75 mission specific challenges
Unlocked: 16 Apr 2016 23:07:06
Complete all Operation F mission challenges
Unlocked: 16 Apr 2016 23:07:06
Complete Operation F
Unlocked: 16 Apr 2016 22:49:36
Terminated
10Complete Operation E
Unlocked: 16 Apr 2016 22:31:02
Evacuated
10Complete Operation D
Unlocked: 16 Apr 2016 21:37:15
Switched Off
10Complete Operation C
Unlocked: 16 Apr 2016 21:30:04
Switched On
10Complete Operation B
Unlocked: 16 Apr 2016 21:21:28
Overrun
10Complete Operation A
Unlocked: 16 Apr 2016 21:04:42
Recruit
5Earn a star of any type
Unlocked: 16 Apr 2016 21:04:42
Prodigy
5Earn your first Gold star
Unlocked: 16 Apr 2016 21:04:42
117
20Earn all Gold stars
Unlocked: 16 Apr 2016 21:04:42
Pension Plan
10Earn 25000 XP throughout your career
Unlocked: 16 Apr 2016 21:04:42
Tour of Duty
10Earn all Gold stars in Operation F
Unlocked: 16 Apr 2016 21:04:42
Score a kill with every handheld weapon (excluding Rocket Launcher and Spartan Laser)
Unlocked: 16 Apr 2016 21:01:46
Earn all medals in the game at least once
Unlocked: 16 Apr 2016 21:01:31