Melee an opponent from behind

Unlocked: 10 Nov 2012 16:56:17

Blow up the Banshee in flight while manned, with grenades or the rocket launcher

Unlocked: 10 Nov 2012 16:48:27

Get awarded at least 8 different medals in one non-team game

Unlocked: 10 Nov 2012 16:48:27

In a non-team game, kill 5 people by melee, from behind

Unlocked: 10 Nov 2012 16:48:23

Kill an opponent that has the Ninja achievement

Unlocked: 10 Nov 2012 16:48:19

Kill an opponent who has the Legend achievement

Unlocked: 10 Nov 2012 16:48:19

Stop a Killing Spree of another player

Unlocked: 10 Nov 2012 16:48:15

Kill the sword carrier after they kill 5 or more times in a row with the sword

Unlocked: 10 Nov 2012 16:48:14

Hit and kill an opponent with a melee attack

Unlocked: 10 Nov 2012 16:48:10

Run over, hit and kill an opponent with a vehicle

Unlocked: 10 Nov 2012 16:48:09

Kill an opponent with the sniper rifle or the beam rifle

Unlocked: 10 Nov 2012 16:48:08

Kill 10 opponents in a row in the same game, without dying

Unlocked: 10 Nov 2012 16:48:07

Kill 5 opponents in a row in the same game, without dying

Unlocked: 10 Nov 2012 16:47:58

Kill 4 opponents within 4 seconds

Unlocked: 10 Nov 2012 16:47:57

Kill 3 opponents within 4 seconds

Unlocked: 10 Nov 2012 16:47:54

Kill 2 opponents within 4 seconds

Unlocked: 10 Nov 2012 16:47:53

Play every available game variant, with at least 3 other players, to the end of each game

Unlocked: 10 Nov 2012 16:47:51

Play every available default map and stay in each game until it’s over

Unlocked: 10 Nov 2012 16:47:50

Steal an occupied vehicle from an opponent and take it over

Unlocked: 10 Nov 2012 16:47:47

Kill the sword carrier

Unlocked: 10 Nov 2012 16:47:45

Kill an enraged, berserk Brute by melee, any level, any difficulty

Unlocked: 10 Nov 2012 16:47:44

Complete any campaign level without dying once on Normal, Heroic, or Legendary

Unlocked: 10 Nov 2012 16:47:41

Acquire the Scarab gun on the Metropolis level, any difficulty

Unlocked: 10 Nov 2012 16:47:38

Complete the game on Heroic difficulty

Unlocked: 07 Nov 2012 18:47:34

Kill 7 opponents from behind in a row without being spotted, any level, any difficulty

Unlocked: 07 Nov 2012 18:47:29

Complete The Great Journey at Normal, Heroic, or Legendary

Unlocked: 07 Nov 2012 18:47:27

Complete the game on Legendary difficulty

Unlocked: 07 Nov 2012 18:47:24

Complete High Charity at Normal, Heroic, or Legendary

Unlocked: 07 Nov 2012 18:47:19

Complete the game on Normal difficulty

Unlocked: 07 Nov 2012 18:47:19

Complete Uprising at Normal, Heroic, or Legendary

Unlocked: 07 Nov 2012 18:47:17

Complete Gravemind at Normal, Heroic, or Legendary

Unlocked: 07 Nov 2012 18:47:16

Complete Quarantine Zone at Normal, Heroic, or Legendary

Unlocked: 07 Nov 2012 18:47:15

Complete Sacred Icon at Normal, Heroic, or Legendary

Unlocked: 07 Nov 2012 18:47:14

Complete Regret at Normal, Heroic, or Legendary

Unlocked: 07 Nov 2012 18:47:10

Complete Delta Halo at Normal, Heroic, or Legendary

Unlocked: 07 Nov 2012 18:47:04

Complete The Oracle at Normal, Heroic, or Legendary

Unlocked: 07 Nov 2012 18:46:56

Complete The Arbiter at Normal, Heroic, or Legendary

Unlocked: 07 Nov 2012 18:46:55

Complete Metropolis at Normal, Heroic, or Legendary

Unlocked: 07 Nov 2012 18:46:54

Complete Outskirts at Normal, Heroic, or Legendary

Unlocked: 07 Nov 2012 18:46:52

Complete Cairo Station at Normal, Heroic, or Legendary

Unlocked: 07 Nov 2012 18:46:48

Stick an opponent with a plasma grenade and blow them up

Unlocked: 05 Nov 2012 18:16:06