Complete mission 1 on any difficulty.

Complete mission 3 on any difficulty.

Complete mission 2 on any difficulty.

Change your Service Tag in the Spartan ID card.

Complete mission 4 on any difficulty.

Complete mission 7 on any difficulty.

Complete mission 8 on any difficulty.

Complete mission 6 on any difficulty.

Complete mission 5 on any difficulty.

Change your Emblem in the Spartan ID card.

Find a Terminal in the Campaign.

Rank up your Spartan-IV to SR-5.

Complete a Challenge.

Complete a Spartan Ops Mission on any difficulty.

Complete the Campaign on Normal or harder.

Change your Spartan's armor in the Spartan Armor card.

Complete any Campaign mission cooperatively on Heroic or harder.

Rank up your Spartan-IV to SR-20.

Win 5 War Games matchmaking matches.

Change your Spartan's pose in the Spartan ID card.

In mission 1, find and access Chief's record.

Win 20 War Games matchmaking matches.

In Mission 7, in solo Campaign, take out both Hunters using only the Sticky Detonator.

Create and save a Custom Map in Forge.

Save a Film Clip from the Theater.

Find one of the RvB Easter Eggs in Spartan Ops.

Upload a File to your File Share.

Assassinate a Knight in any Spartan Ops mission.

Save a Screenshot from the Theater.

Complete any Campaign mission with 3 or more Skulls on Heroic or harder.

Complete all chapters in Spartan Ops Episode 1 on Legendary difficulty.

Save at least one Marine in Chapter 3 of Episode 2 of Spartan Ops on Heroic or harder.

In mission 6, trick or force a Hunter to fall to his demise.

Complete a Spartan Ops chapter solo on Legendary.

Complete all chapters in the first 5 episodes of Spartan Ops on any difficulty.

Complete 25 Challenges.

Create and save a Custom Game type in War Games.

In Crimson DLC matchmaking, score the killing blow on a Mantis.

Complete the Campaign on Legendary difficulty.

In Crimson DLC matchmaking, board an enemy Mantis.

Complete the Campaign on Heroic or harder.

Complete Chapter 4, Episode 5 of Spartan Ops without losing a generator on Heroic or harder.

Complete the Campaign solo on Legendary difficulty.

In mission 8, kill 3 Crawlers in one hit with the Gravity Hammer.

In mission 2, get significant air in the Warthog at midnight.

In Crimson DLC matchmaking, kill an enemy with melee when landing from a Man Cannon.

In Majestic DLC matchmaking, call in 3 ordnance drops during the same game.

In Ch 1, Ep 5 of Spartan Ops survive the enemy assault during the defense on Normal or harder.

In Majestic DLC matchmaking, get the 'Close Call' medal twice during one match.

Complete mission 4 without one preventable Marine death on Heroic or harder.

In mission 3, carry a UNSC weapon all the way through on Heroic or harder.

Find all of the Terminals in the Campaign.

Complete the Campaign cooperatively on Heroic or harder.

In mission 5, steal a Wraith and use it to kill at least four enemy Wraiths on Heroic or harder.

In Crimson DLC matchmaking, get a kill while airborne in a Warthog.

In Castle DLC matchmaking, assassinate an enemy who is using a Hardlight Shield.

In Castle DLC matchmaking, get two direct Spartan Laser kills in one match.

In Castle DLC matchmaking, disable a vehicle and then hijack it.

In Castle DLC matchmaking, disintegrate 6 enemies using Forerunner weapons.

In Castle DLC matchmaking, heal a near-death teammate with Regen Field 5 times.

In Castle DLC matchmaking, destroy 2 vehicles during a single game.

In Majestic DLC matchmaking, perform a melee kill right after using Thrust Pack.

In Castle DLC matchmaking, kill 5 enemies during a match by running them over.

In Castle DLC matchmaking, complete a match in any mode for each Castle map.

In Castle DLC matchmaking, perform 5 melee kills in a single match.

In Crimson DLC matchmaking, kill 20 enemies with a detached Machine Gun Turret.

In Majestic DLC matchmaking, assassinate an enemy who's in zoom mode.

In Crimson DLC matchmaking, shoot an enemy who's airborne from a Man Cannon.

In Crimson DLC matchmaking, kill 20 enemies using the Mantis' stomp attack.

In Crimson DLC matchmaking, kill a player while airborne from a Man Cannon.

In Majestic DLC matchmaking, perform 5 'airsassinations.'

In Majestic DLC matchmaking, kill 5 enemies while Promethean Vision is active.

In Majestic DLC matchmaking, get 4 kills using the SAW without dying.

In Majestic DLC matchmaking, get a Double Kill or higher with one Pulse Grenade.

In Majestic DLC matchmaking, kill 5 enemies while Active Camo is active.

In Majestic DLC matchmaking, kill 3 enemies while they are using Jet Packs.