| The Autumn Leaves |
Complete Pillar of Autumn. |
| Installation 04 |
Complete Halo. |
| Infiltration Anticipation |
Complete Truth and Reconciliation. |
| Bee Thirty |
Complete Silent Cartographer. |
| Control Alt Delete |
Complete Assault on the Control Room. |
| This Stuff is Your History |
Complete 343 Guilty Spark. |
| Protocol Dictates Action |
Complete The Library. |
| Double Trouble |
Complete Two Betrayals. |
| Captain’s Orders |
Complete Keyes. |
| Dust and Echoes Evolved |
Complete The Maw. |
| Before the Fall |
Complete New Mission 1. |
| Tiger Company |
Complete New Mission 2. |
| Personal Space |
Complete New Mission 3. |
| Greenhorn |
Complete the Campaign on Easy Difficulty. |
| Birth of a Spartan |
Complete the Campaign on Normal Difficulty. |
| Heroes Never Die |
Complete the Campaign on Heroic Difficulty. |
| Living Legend |
Complete the Campaign on Legendary Difficulty. |
| Lore Have Mercy |
Activate all 13 Terminals. |
| Clean Sweep |
Find all skulls and terminals in Pillar of Autumn. |
| Successful Search |
Find all skulls and terminals in Halo. |
| Plundered |
Find all skulls and terminals in Truth and Reconciliation. |
| Buried Treasure |
Find all skulls and terminals in The Silent Cartographer. |
| Stowed in Snow |
Find all skulls and terminals in Assault on the Control Room. |
| Proto Gravemind |
Find all skulls and terminals in 343 Guilty Spark. |
| Timeless Tomes |
Find all skulls and terminals in The Library. |
| Outpost Discoveries |
Find all skulls and terminals in Two Betrayals. |
| Priorities |
Find all skulls and terminals in Keyes. |
| No Rush |
Find all skulls and terminals in The Maw. |
| Souvenirs |
Find all skulls and terminals in New Mission 1. |
| Brute Loops |
Find all skulls and terminals in New Mission 2. |
| Parting Gifts |
Find all skulls and terminals in New Mission 3. |
| Cranial |
Collect a Skull. |
| Making a Necklace |
Collect 22 Skulls. |
| Headhunter |
Collect all 39 Skulls. |
| Collector’s Addition |
Find all skulls and terminals in the game. |
| REMIX! |
Complete a Remixed Mission. |
| Beat the Drop |
Complete a Remixed Mission without dying. |
| Mix Master |
Complete an entire Remixed Campaign without dying. |
| Bad Gas |
Destroy 100 Grunt backpacks. |
| Plate Tectonics |
Break off 25 Hunter backplates. |
| New Whip |
Hijack 10 Vehicles. |
| Disarmed |
Dismember 100 Flood parts. |
| Claims Adjuster |
Break off 50 Vehicle parts. |
| Make Them Count |
Kill 100 enemies with headshots. |
| Hot Streak |
With the Floor Is Lava Skull activated beat a mission without jumping or dying. |
| Even Tempered |
With the Temperamental Skull activated beat Halo without upsetting anyone. |
| Like Old Times |
Complete Two Betrayals with the Speed Limit, Endurance Spec, Hip Fire, and Armistice Skulls enabled. |
| Frugal Fire |
Equip Famine, Recession, and Johnny Ammo Seed Skulls and beat a mission without running out of ammo. |
| MYTHIC |
Complete the Campaign with LASO enabled. |
| This is My Ship Now |
Eliminate Captain Keyes and trap his six avenging Marines in the Autumn’s observation pen. |
| Map Quest |
Complete The Silent Cartographer without shooting, using grenades, melee, dying, or restarting. |
| That’s My Ride |
On Assault on the Control Room get to the Banshee before the Elite. |
| Arm’s Length |
On 343 Guilty Spark complete the first floor without taking a hit. |
| Clean Lap |
On The Maw complete the warthog run without being forcibly ejected from your vehicle. |
| Jiralhanae Conservationist |
On New Mission 2 don’t kill any rampaging Brutes. |
| 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. |
| Fully Evolved |
Complete Every Achievement/Collect Every Trophy. |
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