Yippie-Kay-Yay

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.

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

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

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

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

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

Headhunter Collect all 39 Skulls.
100/100

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

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.

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

Lore Have Mercy Activate all 13 Terminals.
100/100

Captain’s Orders Complete Keyes.

Double Trouble Complete Two Betrayals.

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

Protocol Dictates Action Complete The Library.

Disarmed Dismember 100 Flood parts.
100/100

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.

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.

Bee Thirty Complete Silent Cartographer.

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

Making a Necklace Collect 22 Skulls.
100/100

Infiltration Anticipation Complete Truth and Reconciliation.

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

Installation 04 Complete Halo.

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

Make Them Count Kill 100 enemies with headshots.
100/100

Clean Sweep Find all skulls and terminals in Pillar of Autumn.
100/100

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.

Claims Adjuster Break off 50 Vehicle parts.
100/100

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

Tiger Company Complete The Most Dangerous Game.

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

I Can't Quit You Dom Complete all acts in co-op (on any difficulty)
36/36

Mercenary Complete all acts on Casual Difficulty
5/5

Classic Mercenary Complete all acts on Normal Difficulty
5/5

A Dish Best Served Cold (Act 5) Defeat General RAAM

All Aboard! Uh… We're Aboard! (Act 5) Board the Imulsion bound train with the Lightmass Bomb

Shock Therapy (Act 5) Kill the Brumak

Marcus? Is That You? (Act 5) Restore communications with Control

Power Up (Act 5) Restore power to the bridge