Mr_OClock

Kill 'em all Defeat all 8 enemy champions in a single playthrough of the game

Saviour of Humanity Complete the campaign

Bomber Crew Wipe out the Phasmid Homeworld

Double Mastery Fully Level up a crew member in two skills

Mastery Fully level up a crew member

Battle Hardened Have a member of your crew survive 30 missions

Bittersweet success Complete a mission and return to Athena with 2 or fewer crew members surviving

Abandon Ship! Save one or more crew members from certain death by issuing the abandon ship command

Critical Reaction Lose the ship due to a reactor going critical

I feel safer already! Defeat 4 enemy champions in a single playthrough of the game

Escape velocity Purge a crew member through the airlock

Back from the black Recover a Crew Member that was purged through the airlock before he dies.

Do not go gentle into that good night Complete Phase 2 of the Campaign

Engineering Expert Repair on board systems 100 times

Nature abhors a vacuum Extinguish 50 Fires by decompressing the ship

Overdosed Start with all perks equiped

Fully Evolved Collect Every Trophy.

MYTHIC Complete the Campaign with LASO enabled.
100/100

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

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

Food Critic Listen to the Thirsty Grunt talk about his eating habits.

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

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

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

Plate Tectonics Break off 25 Hunter backplates.
100/100

REMIX! Complete a Remixed Mission.

Beat the Drop Complete a Remixed Mission without dying.

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

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

New Whip Hijack 10 Vehicles.
100/100

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

Bad Gas Destroy 100 Grunt backpacks.
100/100

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

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

This is My Ship Now Eliminate Captain Keyes and trap his six avenging Marines in the Autumn’s observation pen.

Personal Space Complete Heavy Burden.

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

Headhunter Collect all 39 Skulls.
100/100

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

Lore Have Mercy Activate all 13 Terminals.
100/100

Tiger Company Complete The Most Dangerous Game.

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

Before the Fall Complete Boarding Action.

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

Dust & Echoes Evolved Complete The Maw.

Greenhorn Complete the Campaign on Easy Difficulty.
100/100

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

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

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

No Rush Find all skulls and terminals in The Maw.
100/100