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