On 343 Guilty Spark complete the first floor without taking a hit
Complete Every Achievement.
With the Floor Is Lava Skull activated beat a mission without jumping or dying.
On The Most Dangerous Game don't kill any rampaging Brutes
Complete The Silent Cartographer without shooting, using grenades, melee, dying, or restarting.
Complete any level on Heroic difficulty or higher without taking health damage
Eliminate Captain Keyes and trap his six avenging Marines in the Autumn's observation pen.
Complete Two Betrayals with the Speed Limit, Endurance Spec, Hip Fire, and Armistice Skulls enabled.
With the Temperamental Skull activated beat Halo without upsetting anyone.
Complete an entire Remixed Campaign without dying.
Hijack 10 Vehicles.
Equip Famine, Recession, and Johnny Ammo Tree Skulls and beat a mission without running out of ammo.
Complete a Remixed Mission without dying.
Complete a Remixed Mission.
Complete the Campaign with LASO enabled
Complete the Campaign on Heroic Difficulty.
Complete the Campaign on Legendary Difficulty.
Complete the Campaign on Normal Difficulty.
On Assault on the Control Room get to the Banshee before the Elite
Find all skulls and terminals in Keyes.
Collect all 39 Skulls.
Find all skulls and terminals in the game.
Listen to the Thirsty Grunt talk about his eating habits
Find all skulls and terminals in The Maw.
Activate all 13 Terminals.
Find all skulls and terminals in Truth and Reconciliation.
Find all skulls and terminals in Halo.
Complete Heavy Burden.
Find all skulls and terminals in Heavy Burden.
Complete The Most Dangerous Game.
Find all skulls and terminals in The Most Dangerous Game.
Complete Boarding Action.
Find all skulls and terminals in Boarding Action.
Destroy 100 Grunt backpacks.
Complete The Maw.
Complete the Campaign on Easy Difficulty.
On The Maw complete the warthog run without being forcibly ejected from your vehicle.
Complete Keyes.
Break off 25 Hunter backplates.
Complete Two Betrayals.
Find all skulls and terminals in Two Betrayals.
Collect 22 Skulls.
Complete The Library.
Find all skulls and terminals in The Library.
Dismember 100 Flood parts.
Complete 343 Guilty Spark.
Find all skulls and terminals in 343 Guilty Spark.
Complete Assault on the Control Room.
Find all skulls and terminals in Assault on the Control Room.
Break off 50 Vehicle parts.
Complete Silent Cartographer.
Find all skulls and terminals in Silent Cartographer.
Complete Truth and Reconciliation.
Kill 100 enemies with headshots.
Complete Halo.
Complete Pillar of Autumn.
Find all skulls and terminals in Pillar of Autumn.
Collect a Skull.
