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

Unlocked: 04 Dec 2012 04:10:20

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

Unlocked: 04 Dec 2012 03:45:31

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

Unlocked: 04 Dec 2012 03:15:30

Complete 25 Challenges.

Unlocked: 16 Nov 2012 00:18:34

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

Unlocked: 13 Nov 2012 02:14:01

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

Unlocked: 11 Nov 2012 06:59:37

Find all of the Terminals in the Campaign.

Unlocked: 11 Nov 2012 05:45:32

Complete the Campaign on Legendary difficulty.

Unlocked: 11 Nov 2012 03:31:38

Complete the Campaign solo on Legendary difficulty.

Unlocked: 11 Nov 2012 03:31:38

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

Unlocked: 10 Nov 2012 05:30:02

Win 20 War Games matchmaking matches.

Unlocked: 08 Nov 2012 05:06:43

Rank up your Spartan-IV to SR-20.

Unlocked: 08 Nov 2012 03:07:25

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

Unlocked: 08 Nov 2012 02:45:06

Assassinate a Knight in any Spartan Ops mission.

Unlocked: 07 Nov 2012 20:26:42

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

Unlocked: 07 Nov 2012 20:01:29

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

Unlocked: 07 Nov 2012 19:01:50

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

Unlocked: 07 Nov 2012 07:56:06

Complete mission 8 on any difficulty.

Unlocked: 07 Nov 2012 07:24:22

Complete the Campaign on Normal or harder.

Unlocked: 07 Nov 2012 07:24:22

Complete the Campaign on Heroic or harder.

Unlocked: 07 Nov 2012 07:24:22

Complete the Campaign cooperatively on Heroic or harder.

Unlocked: 07 Nov 2012 07:24:22

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

Unlocked: 07 Nov 2012 06:54:58

Complete mission 7 on any difficulty.

Unlocked: 07 Nov 2012 06:21:13

Complete mission 6 on any difficulty.

Unlocked: 07 Nov 2012 05:39:37

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

Unlocked: 07 Nov 2012 05:34:05

Complete mission 5 on any difficulty.

Unlocked: 07 Nov 2012 04:43:43

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

Unlocked: 07 Nov 2012 04:39:11

Complete mission 4 on any difficulty.

Unlocked: 07 Nov 2012 02:41:06

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

Unlocked: 07 Nov 2012 02:13:06

Complete mission 3 on any difficulty.

Unlocked: 07 Nov 2012 01:33:31

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

Unlocked: 07 Nov 2012 01:31:49

Find a Terminal in the Campaign.

Unlocked: 07 Nov 2012 00:55:50

Complete mission 2 on any difficulty.

Unlocked: 07 Nov 2012 00:35:26

Complete mission 1 on any difficulty.

Unlocked: 07 Nov 2012 00:00:00

Complete any Campaign mission cooperatively on Heroic or harder.

Unlocked: 07 Nov 2012 00:00:00

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

Unlocked: 06 Nov 2012 23:45:04

Win 5 War Games matchmaking matches.

Unlocked: 06 Nov 2012 21:55:31

Save a Film Clip from the Theater.

Unlocked: 06 Nov 2012 21:17:59

Upload a File to your File Share.

Unlocked: 06 Nov 2012 21:16:43

Save a Screenshot from the Theater.

Unlocked: 06 Nov 2012 21:15:48

Create and save a Custom Game type in War Games.

Unlocked: 06 Nov 2012 21:13:28

Create and save a Custom Map in Forge.

Unlocked: 06 Nov 2012 21:08:15

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

Unlocked: 06 Nov 2012 19:03:06

Complete a Spartan Ops Mission on any difficulty.

Unlocked: 06 Nov 2012 18:30:33

Complete a Spartan Ops chapter solo on Legendary.

Unlocked: 06 Nov 2012 18:30:33

Complete a Challenge.

Unlocked: 06 Nov 2012 18:29:34

Rank up your Spartan-IV to SR-5.

Unlocked: 06 Nov 2012 17:59:12

Change your Emblem in the Spartan ID card.

Unlocked: 06 Nov 2012 17:14:53

Change your Service Tag in the Spartan ID card.

Unlocked: 06 Nov 2012 17:13:52

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

Unlocked: 17 Dec 2012 00:26:09

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

Unlocked: 17 Dec 2012 00:22:33

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

Unlocked: 17 Dec 2012 00:18:17

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

Unlocked: 17 Dec 2012 00:18:17

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

Unlocked: 17 Dec 2012 00:07:39

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

Unlocked: 16 Dec 2012 23:47:33

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

Unlocked: 16 Dec 2012 23:39:01

In Crimson DLC matchmaking, board an enemy Mantis.

Unlocked: 16 Dec 2012 23:37:41

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

Unlocked: 07 Apr 2013 20:42:05

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

Unlocked: 07 Apr 2013 20:40:30

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

Unlocked: 07 Apr 2013 20:39:59

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

Unlocked: 07 Apr 2013 20:34:56

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

Unlocked: 07 Apr 2013 20:32:04

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

Unlocked: 07 Apr 2013 20:32:04

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

Unlocked: 07 Apr 2013 20:30:43

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

Unlocked: 07 Apr 2013 20:29:02

In Majestic DLC matchmaking, perform 5 'airsassinations.'

Unlocked: 07 Apr 2013 20:27:06

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

Unlocked: 07 Apr 2013 20:26:06

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

Unlocked: 08 Apr 2013 20:17:09

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

Unlocked: 08 Apr 2013 20:07:36

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

Unlocked: 08 Apr 2013 19:59:59

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

Unlocked: 08 Apr 2013 19:51:26

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

Unlocked: 08 Apr 2013 19:48:05

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

Unlocked: 08 Apr 2013 19:44:24

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

Unlocked: 08 Apr 2013 19:37:13

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

Unlocked: 08 Apr 2013 19:31:31

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

Unlocked: 08 Apr 2013 19:30:41

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

Unlocked: 20 Aug 2013 22:14:56

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

Unlocked: 20 Aug 2013 21:33:05

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

Unlocked: 20 Aug 2013 21:20:47

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

Unlocked: 20 Aug 2013 21:19:22

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

Unlocked: 20 Aug 2013 21:18:11

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

Unlocked: 20 Aug 2013 21:16:32

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

Unlocked: 20 Aug 2013 21:15:39

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

Unlocked: 20 Aug 2013 21:14:14

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

Unlocked: 20 Aug 2013 20:56:53

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

Unlocked: 20 Aug 2013 20:47:32