Completed any Mission with 3+ Skulls active on Heroic difficulty.
Completed 5 matchmade games of Slayer.
Reached 50,000 points in Score Attack with a Skull multiplier of x2 or higher.
Completed a mission in Score Attack co-op, with all participants scoring at least 200,000 points.
Completed The Breaking on Legendary difficulty without the entire fireteam dying.
Completed Swords of Sanghelios co-op with both Mantises on Heroic difficulty.
Simultaneously destroyed 2 cores in Guardians on Heroic difficulty.
Simultaneously assassinated two Elites in Blue Team co-op.
Spectated a game.
Completed every Mission of the game on Normal difficulty.
Completed every Mission of the game on Heroic difficulty.
Completed every co-op Mission on Heroic difficulty.
Completed Mission 10.
Completed Mission 15.
Used a Ground Pound on an exterior power core in Guardians on Heroic difficulty.
Completed Mission 14.
Completed Mission 13.
Completed a mission in Score Attack with at least 500,000 points.
Completed Mission 12.
Completed Mission 11.
Escaped the doomed Kraken by jumping onto a Phaeton piloted by a Spartan.
Completed Mission 9.
Completed Mission 8.
Completed Mission 7.
Completed Mission 6.
Finished Evacuation within 18:00 without dying on Heroic difficulty.
Completed Mission 5.
Killed an enemy that's had its armor repaired in Unconfirmed.
Completed Mission 4.
Completed Mission 3.
Completed Mission 2.
Completed any co-op Mission on Heroic difficulty.
Completed a mission in Score Attack with at least 10,000 points.
Beat the par time of a mission in Score Attack.
Changed your Spartan's gear in the Spartan Hub.
Created and saved a Custom Game.
Found and claimed a Skull.
Completed Mission 1.
Commanded your team of Spartans in Osiris.
Found and claimed one piece of Intel.
Changed your Service Tag in the Spartan Hub.
Changed your Emblem in the Spartan Hub.
Opened a Gold REQ Pack.
Completed 3 matchmade games of Warzone.
Called in a REQ that costs 5 Energy or more.
Won a match on all three original Warzone maps.
Completed 5 matchmade games of Strongholds.
Completed 5 matchmade games of Breakout.
Completed 5 matchmade games of Capture the Flag.
Completed every Mission of the game on Legendary difficulty.
Killed a Legendary Boss in Warzone.
Found and claimed all Intel.
Found and claimed all Skulls.
Helped the Elite General charge the hill in Osiris on Heroic difficulty.
Escaped the Hunters in the lab and fought them in the hangar in Blue Team.
Completed Glassed without entering a vehicle.
Completed Glassed without any players using Smart-Link.
Teamed up in a vehicle to kill 30 enemies in Unconfirmed co-op.
Kept 6 miners alive at the elevator in Evacuation on Heroic difficulty.
Traversed the canyon without a Phaeton in Reunion on Heroic difficulty.
Destroyed the Phantom at the Covenant camp in Reunion on Heroic difficulty.
Destroyed 10 walls or floors in Swords of Sanghelios.
Completed Enemy Lines without destroying a Kraken turret.
Killed a Grunt and smashed a grate with a Ground Pound in Battle of Sunaion.
Knocked two Hunters into the ocean during the Battle of Sunaion.
Finished the 13th mission without losing the Scorpion on Legendary difficulty.
Operated four different vehicles at once in Mission 13 on Heroic difficulty.
Simultaneously killed two Wardens in The Breaking on Heroic difficulty.
Completed every Mission of the game by yourself on Legendary difficulty.
Qualified for a Competitive Skill Rating.
Successfully completed 5 Warzone Firefight matches.
Completed a Warzone Firefight match on 6 unique maps.
Earned a Mythic Boss Takedown in a Warzone Firefight match.
