Halo 4

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

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

Changed your Emblem in the Spartan ID card.

Completed the Campaign cooperatively on Heroic or harder.

Completed any Campaign mission cooperatively on Heroic or harder.

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

Killed 3 Crawlers in one hit with the Gravity Hammer in mission 8.

Completed mission 7 on any difficulty.

Found a Terminal in the Campaign.

Completed a Spartan Ops chapter solo on Legendary.

Completed mission 1 on any difficulty.

Completed all chapters in any 5 episodes of Spartan Ops on any difficulty.

Found and accessed Chief's record in mission 1.

Tricked or forced a Hunter to fall to his demise in mission 6.

Completed mission 3 on any difficulty.

Created and saved a Custom Game type in War Games.

Took out both Hunters using only the Sticky Detonator in mission 7.

Won 20 War Games matchmaking matches.

Won 5 War Games matchmaking matches.

Completed the Campaign on Heroic or harder.

Completed mission 4 on any difficulty.

Assassinated a Knight in any Spartan Ops mission.

Completed the Campaign solo on Legendary difficulty.

Completed mission 8 on any difficulty.

Got significant air in the Warthog at midnight in mission 2.

Stole a Wraith and used it to kill at least four enemy Wraiths in mission 5 on Heroic or harder.

Ranked up your Spartan-IV to SR-20.

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

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

Ranked up your Spartan-IV to SR-5.

Completed a Spartan Ops Mission on any difficulty.

Changed your Service Tag in the Spartan ID card.

Completed mission 5 on any difficulty.

Completed mission 2 on any difficulty.

Found one of the RvB Easter Eggs in Episodes 1 to 5 of Spartan Ops.

Uploaded a File to your File Share.

Completed mission 6 on any difficulty.

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

Saved a Screenshot from the Theater.

Found all of the Terminals in the Campaign.

Created and saved a Custom Map in Forge.

Completed a Challenge.

Completed 25 Challenges.

Saved a Film Clip from the Theater.

Completed the Campaign on Legendary difficulty.

Carried a UNSC weapon all the way through mission 3 on Heroic or harder.

Completed the Campaign on Normal or harder.

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

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

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

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

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

In Majestic DLC matchmaking, performed 5 'airsassinations.'

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

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

In matchmaking, scored a goal in Ricochet while taking damage with the Resistor active.

In Crimson DLC matchmaking, shot an enemy who’s airborne from a Man Cannon.

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

In Crimson DLC matchmaking, boarded an enemy Mantis.

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

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

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

In matchmaking, scored by throwing the ball from 30 meters in Ricochet.

In Bullseye DLC matchmaking, acquired the Rocket Launcher at the start of a match on Pitfall.

In matchmaking, scored three times in one round of Ricochet.

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

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

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

In matchmaking, recovered full shields from low health with both Resistor and Recharge active.

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

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

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

In matchmaking, got four consecutive kills with the Rocket Launcher without dying.

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

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

In matchmaking, effectively camped one location without dying for a full 60 seconds.

In matchmaking, assassinated the ball carrier within five meters of your own goal in Ricochet.

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

In matchmaking, survived three vehicle explosions in a row with the Survivor package.

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

In Bullseye DLC matchmaking, activated both electrical surge systems during a match on Vertigo.

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

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

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

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

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