X-DAY1206

Test Complete Complete "Test Chamber"

Half-baked puzzle Find the cake in "Test Chamber"

Full steam ahead Complete "Steampunk Party"

Need to vent Go through all the ventilation shafts in "Test Chamber"

Let off some steam Find and turn the hidden valves in "Steampunk Party"

Party Animal Start the party in "Steampunk Party"

Souvenirs Find all skulls and terminals in Boarding Action.
25/100

Brute Loops Find all skulls and terminals in The Most Dangerous Game.
0/100

Parting Gifts Find all skulls and terminals in Heavy Burden.
0/100

Lore Have Mercy Activate all 13 Terminals.
76/100

Headhunter Collect all 39 Skulls.
79/100

Collector’s Addition Find all skulls and terminals in the game.
78/100

Clean Lap On The Maw complete the warthog run without being forcibly ejected from your vehicle.

Birth of a Spartan Complete the Campaign on Normal Difficulty.
0/100

New Whip Hijack 10 Vehicles.
30/100

All Shield, No Yield Complete any level on Heroic difficulty or higher without taking health damage.

REMIX! Complete a Remixed Mission.

Map Quest Complete The Silent Cartographer without shooting, using grenades, melee, dying, or restarting.

Beat the Drop Complete a Remixed Mission without dying.

Hot Streak With the Floor Is Lava Skull activated beat a mission without jumping or dying.

Jiralhanae Conservationist On The Most Dangerous Game don’t kill any rampaging Brutes.

Like Old Times Complete Two Betrayals with the Speed Limit, Endurance Spec, Hip Fire, and Armistice Skulls enabled.

Arm's Length On 343 Guilty Spark complete the first floor without taking a hit.

Frugal Fire Equip Famine, Recession, and Johnny Ammo Tree Skulls and beat a mission without running out of ammo.

Heroes Never Die Complete the Campaign on Heroic Difficulty.
0/100

Even Tempered With the Temperamental Skull activated beat Halo without upsetting anyone.

Living Legend Complete the Campaign on Legendary Difficulty.
0/100

MYTHIC Complete the Campaign with LASO enabled.
0/100

Mix Master Complete an entire Remixed Campaign without dying.
0/100

Fully Evolved Collect Every Trophy.