Silvertip
10Destroy all Mega Turrets with the Grizzly tank in Operation F, Mission 2
Unlocked: 30 Nov 2013 09:34:11
Complete Operation F
Unlocked: 30 Nov 2013 09:16:22
Tour of Duty
10Earn all Gold stars in Operation F
Unlocked: 30 Nov 2013 09:04:13
Complete Operation F, Mission 4 with the Blind and Thunderstorm Skulls active
Unlocked: 30 Nov 2013 09:04:13
Complete all Operation F mission challenges
Unlocked: 30 Nov 2013 08:57:16
Extra Credit
10Complete 75 mission specific challenges
Unlocked: 20 Jul 2013 08:59:58
Pension Plan
10Earn 25000 XP throughout your career
Unlocked: 20 Jul 2013 08:55:46
Complete Operation E, Mission 1 with the Hollow and Black Eye Skulls active
Unlocked: 20 Jul 2013 00:01:07
Foot Soldier
10Finish the objective without using any vehicles/turrets in Operation E, Mission 4
Unlocked: 19 Jul 2013 22:18:53
Brute Force
10Finish the objectives using only the Brute Shot, melee and grenades in Operation D, Mission 1
Unlocked: 19 Jul 2013 21:53:02
Kill a convoy target with every stationary gun in Operation C, Mission 3
Unlocked: 19 Jul 2013 21:51:19
Prevent all Jackals from regenerating their shields in Operation B, Mission 3
Unlocked: 19 Jul 2013 21:47:24
Overrun
10Complete Operation A
Unlocked: 19 Jul 2013 21:25:10
Switched On
10Complete Operation B
Unlocked: 19 Jul 2013 21:20:54
Switched Off
10Complete Operation C
Unlocked: 19 Jul 2013 21:18:38
Evacuated
10Complete Operation D
Unlocked: 19 Jul 2013 21:13:31
Terminated
10Complete Operation E
Unlocked: 19 Jul 2013 21:08:41
117
20Earn all Gold stars
Unlocked: 19 Jul 2013 20:55:21
Use every armor ability at least once (excluding Overshield and Seeker Drone)
Unlocked: 19 Jul 2013 20:54:28
Earn all medals in the game at least once
Unlocked: 19 Jul 2013 20:54:23
Score a kill with every handheld weapon (excluding Rocket Launcher and Spartan Laser)
Unlocked: 19 Jul 2013 20:54:22
Keep all Wolverines intact in Operation A, Mission 3
Unlocked: 19 Jul 2013 01:13:09
Skull Combo
10Complete any mission with the maximum number of Skulls active
Unlocked: 19 Jul 2013 01:06:11
Prodigy
5Earn your first Gold star
Unlocked: 19 Jul 2013 00:51:53
Recruit
5Earn a star of any type
Unlocked: 19 Jul 2013 00:51:52