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

Unlocked: 05 Dec 2012 23:15:27

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

Unlocked: 05 Dec 2012 22:52:29

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

Unlocked: 05 Dec 2012 22:17:27

Complete a Spartan Ops chapter solo on Legendary.

Unlocked: 26 Nov 2012 11:47:51

Complete the Campaign on Legendary difficulty.

Unlocked: 24 Nov 2012 01:46:32

Complete the Campaign cooperatively on Heroic or harder.

Unlocked: 24 Nov 2012 01:46:32

Find all of the Terminals in the Campaign.

Unlocked: 24 Nov 2012 01:17:58

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

Unlocked: 24 Nov 2012 00:25:48

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

Unlocked: 23 Nov 2012 01:08:18

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

Unlocked: 23 Nov 2012 00:29:49

Complete 25 Challenges.

Unlocked: 20 Nov 2012 14:01:20

Complete mission 8 on any difficulty.

Unlocked: 20 Nov 2012 12:16:07

Complete the Campaign on Normal or harder.

Unlocked: 20 Nov 2012 12:16:07

Complete the Campaign on Heroic or harder.

Unlocked: 20 Nov 2012 12:16:07

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

Unlocked: 20 Nov 2012 11:32:47

Complete mission 7 on any difficulty.

Unlocked: 19 Nov 2012 15:26:01

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

Unlocked: 19 Nov 2012 01:19:45

Complete mission 6 on any difficulty.

Unlocked: 19 Nov 2012 00:51:49

Complete any Campaign mission cooperatively on Heroic or harder.

Unlocked: 19 Nov 2012 00:51:49

Upload a File to your File Share.

Unlocked: 18 Nov 2012 16:26:22

Save a Film Clip from the Theater.

Unlocked: 18 Nov 2012 16:24:36

Save a Screenshot from the Theater.

Unlocked: 18 Nov 2012 16:17:05

Complete mission 5 on any difficulty.

Unlocked: 17 Nov 2012 22:53:00

Complete mission 4 on any difficulty.

Unlocked: 14 Nov 2012 13:58:25

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

Unlocked: 13 Nov 2012 22:39:39

Complete mission 3 on any difficulty.

Unlocked: 12 Nov 2012 14:18:16

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

Unlocked: 12 Nov 2012 14:15:26

Complete mission 2 on any difficulty.

Unlocked: 11 Nov 2012 10:25:39

Find a Terminal in the Campaign.

Unlocked: 11 Nov 2012 10:22:56

Complete mission 1 on any difficulty.

Unlocked: 10 Nov 2012 12:09:34

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

Unlocked: 10 Nov 2012 11:39:21

Win 20 War Games matchmaking matches.

Unlocked: 09 Nov 2012 15:54:24

Rank up your Spartan-IV to SR-20.

Unlocked: 09 Nov 2012 14:39:59

Create and save a Custom Game type in War Games.

Unlocked: 09 Nov 2012 12:30:54

Create and save a Custom Map in Forge.

Unlocked: 09 Nov 2012 12:27:13

Win 5 War Games matchmaking matches.

Unlocked: 09 Nov 2012 01:14:25

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

Unlocked: 08 Nov 2012 23:34:31

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

Unlocked: 08 Nov 2012 23:32:49

Assassinate a Knight in any Spartan Ops mission.

Unlocked: 08 Nov 2012 22:43:57

Complete a Spartan Ops Mission on any difficulty.

Unlocked: 08 Nov 2012 22:00:03

Complete a Challenge.

Unlocked: 08 Nov 2012 19:05:11

Rank up your Spartan-IV to SR-5.

Unlocked: 08 Nov 2012 18:18:42

Change your Service Tag in the Spartan ID card.

Unlocked: 08 Nov 2012 17:36:20

Change your Emblem in the Spartan ID card.

Unlocked: 08 Nov 2012 17:35:57

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

Unlocked: 08 Nov 2012 17:34:50

Complete the Campaign solo on Legendary difficulty.

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

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

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

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

Unlocked: 10 Dec 2012 22:56:27

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

Unlocked: 10 Dec 2012 22:51:47

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

Unlocked: 10 Dec 2012 22:49:08

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

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

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

In Crimson DLC matchmaking, board an enemy Mantis.

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

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

In Majestic DLC matchmaking, perform 5 'airsassinations.'

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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