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

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

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

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

Plundered Find all skulls and terminals in Truth and Reconciliation.
100/100

Headhunter Collect all 39 Skulls.
100/100

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

Personal Space Complete Heavy Burden.

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

Lore Have Mercy Activate all 13 Terminals.
100/100

Tiger Company Complete The Most Dangerous Game.

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

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

REMIX! Complete a Remixed Mission.

Beat the Drop Complete a Remixed Mission without dying.

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.

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

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

Before the Fall Complete Boarding Action.

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

New Whip Hijack 10 Vehicles.
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

Captain’s Orders Complete Keyes.

Priorities Find all skulls and terminals in Keyes.
100/100

Double Trouble Complete Two Betrayals.

Outpost Discoveries Find all skulls and terminals in Two Betrayals.
100/100

Making a Necklace Collect 22 Skulls.
100/100

Protocol Dictates Action Complete The Library.

Timeless Tomes Find all skulls and terminals in The Library.
100/100

Proto Gravemind Find all skulls and terminals in 343 Guilty Spark.
100/100

This Stuff is Your History Complete 343 Guilty Spark.

Disarmed Dismember 100 Flood parts.
100/100

Control Alt Delete Complete Assault on the Control Room.

Stowed in Snow Find all skulls and terminals in Assault on the Control Room.
100/100

That’s My Ride On Assault on the Control Room get to the Banshee before the Elite.

Claims Adjuster Break off 50 Vehicle parts.
100/100

Plate Tectonics Break off 25 Hunter backplates.
100/100

The False Idol Complete ‘All Gods Burn’ at C+ on 'Standard' difficulty or higher

Bee Thirty Complete Silent Cartographer.

Buried Treasure Find all skulls and terminals in Silent Cartographer.
100/100

All Secrets Safe Answer the phone call in the bank vault. It’s for you.

The Margay Complete ‘3 Letter Triad’ at C+ on 'Standard' difficulty or higher

Successful Search Find all skulls and terminals in Halo.
100/100

The Flash Point Complete ‘No Good Deed’ at C+ on 'Standard' difficulty or higher