Complete any Mission with 3+ Skulls active on Heroic difficulty.

Unlocked: 08 Jul 2017 16:28:06

Destroy the Phantom at the Covenant camp in Reunion on Heroic difficulty.

Unlocked: 22 Apr 2016 19:39:51

Traverse the canyon without a Phaeton in Reunion on Heroic difficulty.

Unlocked: 22 Apr 2016 16:45:10

Finish Evacuation within 18:00 without dying on Heroic difficulty.

Unlocked: 22 Apr 2016 16:21:15

Keep 6 miners alive at the elevator in Evacuation on Heroic difficulty.

Unlocked: 22 Apr 2016 16:13:18

Team up in a vehicle to kill 30 enemies in Unconfirmed co-op.

Unlocked: 22 Apr 2016 15:46:21

Escape the Hunters in the lab and fight them in the hangar in Blue Team.

Unlocked: 22 Apr 2016 14:38:59

Simultaneously assassinate two Elites in Blue Team co-op.

Unlocked: 22 Apr 2016 14:20:48

Complete 5 matchmade games of Breakout.

Unlocked: 12 Dec 2015 14:30:04

Complete 5 matchmade games of Strongholds.

Unlocked: 12 Dec 2015 13:57:20

Complete every Mission of the game on Heroic difficulty.

Unlocked: 06 Nov 2015 19:49:25

Complete every Mission of the game on Legendary difficulty.

Unlocked: 06 Nov 2015 19:49:25

Complete every co-op Mission on Heroic difficulty.

Unlocked: 06 Nov 2015 19:49:25

Complete any co-op Mission on Heroic difficulty.

Unlocked: 03 Nov 2015 13:02:20

Spectate a game.

Unlocked: 02 Nov 2015 12:27:54

Complete every Mission of the game on Normal difficulty.

Unlocked: 02 Nov 2015 09:16:25

Complete Mission 15.

Unlocked: 02 Nov 2015 09:16:25

Complete Mission 14.

Unlocked: 02 Nov 2015 08:36:51

Complete Mission 13.

Unlocked: 02 Nov 2015 08:11:03

Complete Mission 12.

Unlocked: 02 Nov 2015 07:33:40

Complete Mission 11.

Unlocked: 02 Nov 2015 06:57:51

Complete Mission 10.

Unlocked: 02 Nov 2015 06:48:31

Complete Mission 9.

Unlocked: 01 Nov 2015 11:46:14

Complete Mission 8.

Unlocked: 01 Nov 2015 11:25:12

Complete Mission 7.

Unlocked: 01 Nov 2015 10:42:51

Complete Mission 6.

Unlocked: 01 Nov 2015 10:01:12

Complete Mission 5.

Unlocked: 01 Nov 2015 09:39:46

Kill an enemy that's had its armor repaired in Unconfirmed.

Unlocked: 01 Nov 2015 09:11:04

Complete Mission 4.

Unlocked: 01 Nov 2015 09:05:00

Complete Mission 3.

Unlocked: 01 Nov 2015 08:54:00

Complete Mission 2.

Unlocked: 01 Nov 2015 08:26:23

Find and claim one piece of Intel.

Unlocked: 01 Nov 2015 07:12:49

Complete Mission 1.

Unlocked: 31 Oct 2015 08:05:15

Find and claim a Skull.

Unlocked: 31 Oct 2015 07:55:15

Command your team of Spartans in Osiris.

Unlocked: 31 Oct 2015 07:38:40

Win a match on all three original Warzone maps.

Unlocked: 27 Oct 2015 16:45:50

Complete 5 matchmade games of Capture the Flag.

Unlocked: 27 Oct 2015 14:39:07

Complete 5 matchmade games of Slayer.

Unlocked: 27 Oct 2015 14:21:56

Qualify for a Competitive Skill Rating.

Unlocked: 27 Oct 2015 14:10:14

Call in a REQ that costs 5 Energy or more.

Unlocked: 27 Oct 2015 12:10:31

Complete 3 matchmade games of Warzone.

Unlocked: 27 Oct 2015 10:33:18

Kill a Legendary Boss in Warzone.

Unlocked: 27 Oct 2015 10:32:37

Open a Gold REQ Pack.

Unlocked: 26 Oct 2015 19:57:35

Change your Spartan's gear in the Spartan Hub.

Unlocked: 26 Oct 2015 16:52:38

Change your Service Tag in the Spartan Hub.

Unlocked: 26 Oct 2015 16:41:11

Change your Emblem in the Spartan Hub.

Unlocked: 26 Oct 2015 16:35:56

Create and save a Custom Game.

Find and claim all Intel.

Find and claim all Skulls.

Help the Elite General charge the hill in Osiris on Heroic difficulty.

Complete Glassed without entering a vehicle.

Complete Glassed without any players using Smart-Link.

Destroy 10 walls or floors in Swords of Sanghelios.

Complete Swords of Sanghelios co-op with both Mantises on Heroic difficulty.

Complete Enemy Lines without destroying a Kraken turret.

Escape the doomed Kraken by jumping onto a Phaeton piloted by a Spartan.

Kill a Grunt and smash a grate with a Ground Pound in Battle of Sunaion.

Knock two Hunters into the ocean during the Battle of Sunaion.

Finish the 13th mission without losing the Scorpion on Legendary difficulty.

Operate four different vehicles at once in Mission 13 on Heroic difficulty.

Complete The Breaking on Legendary difficulty without the entire fireteam dying.

Simultaneously kill two Wardens in The Breaking on Heroic difficulty.

Use a Ground Pound on an exterior power core in Guardians on Heroic difficulty.

Simultaneously destroy 2 cores in Guardians on Heroic difficulty.

Complete every Mission of the game by yourself on Legendary difficulty.

Complete a mission in Score Attack with at least 10,000 points.

Unlocked: 24 Nov 2016 16:59:00

Successfully complete 5 Warzone Firefight matches.

Unlocked: 30 Jun 2016 13:03:41

Complete a Warzone Firefight match on 6 unique maps.

Unlocked: 29 Jun 2016 19:01:20

Earn a Mythic Boss Takedown in a Warzone Firefight match.

Unlocked: 29 Jun 2016 17:27:46

Reach 50,000 points in Score Attack with a Skull multiplier of x2 or higher.

Complete a mission in Score Attack co-op, with all participants scoring at least 200,000 points.

Beat the par time of a mission in Score Attack.

Complete a mission in Score Attack with at least 500,000 points.