Accumulate 250 dismemberments in any multiplayer mode.

Unlocked: 27 Dec 2007 10:49:28

Kill 75 enemies by shooting them in the groin in any multiplayer mode.

Unlocked: 27 Dec 2007 10:18:07

Achieve a 25% vital zone hit ratio in a multiplayer match.

Unlocked: 26 Dec 2007 00:55:38

Kill 30 enemy flag carriers in Capture The Flag.

Unlocked: 26 Dec 2007 00:25:41

Disarm 15 bombs in Demolition mode.

Unlocked: 25 Dec 2007 22:54:57

Finish a multiplayer match with 100% accuracy (Minimum of 10 kills).

Unlocked: 25 Dec 2007 22:00:48

Have a 5 to 1 or better Kill to Death ratio in a multiplayer match (minimum of 20 kills).

Unlocked: 25 Dec 2007 22:00:48

Accumulate 100 headshots over Xbox LIVE in any mode.

Unlocked: 25 Dec 2007 22:00:44

Achieve 5 headshots in a row without dying using a sniper rifle in a multiplayer match.

Unlocked: 25 Dec 2007 21:55:09

Complete the game without dying on Normal or Hard difficulty.

Unlocked: 25 Dec 2007 20:03:14

Kill 1000 enemies throughout the campaign.

Unlocked: 25 Dec 2007 17:04:16

Complete the game on any difficulty setting.

Unlocked: 25 Dec 2007 16:11:38

Complete the game on the hardest difficulty setting.

Unlocked: 25 Dec 2007 16:11:38

Complete the Donetsk levels on the hardest difficulty setting.

Unlocked: 25 Dec 2007 16:11:37

Perform 500 dismemberments throughout the campaign.

Unlocked: 24 Dec 2007 23:34:42

Complete the Llebo levels on the hardest difficulty setting.

Unlocked: 24 Dec 2007 23:12:27

Complete the Eshkashem levels on the hardest difficulty setting.

Unlocked: 24 Dec 2007 21:24:49

Complete the Mogaung levels on the hardest difficulty setting.

Unlocked: 24 Dec 2007 18:55:58

Survived an entire Deathmatch without hurting anyone (minimum of 4 active players).

Unlocked: 24 Dec 2007 15:15:39

Achieve 10 kills from a distance greater than 100 feet without a scope in any multiplayer mode.

Unlocked: 24 Dec 2007 13:22:20

Killed yourself and an opponent with an explosive 10 times in any multiplayer mode.

Unlocked: 24 Dec 2007 13:13:09

Achieve 50 kills using pistols in any multiplayer mode.

Unlocked: 24 Dec 2007 01:19:48

Perform 300 reloads in any multiplayer mode.

Unlocked: 24 Dec 2007 00:35:00

Accumulate 30 kills with a silencer over Xbox LIVE.

Unlocked: 24 Dec 2007 00:10:40

Shoot off all 4 limbs on any combination of players over the course of a multiplayer match.

Unlocked: 24 Dec 2007 00:07:25

Complete the Al Qa’im level on the hardest difficulty setting.

Unlocked: 23 Dec 2007 23:46:36

Perform a dismemberment at every point on the enemies' bodies.

Unlocked: 23 Dec 2007 23:03:11

Kill 5 enemies in 5 seconds in any game mode.

Unlocked: 23 Dec 2007 22:45:59

Kill 10 enemies while crouching in any multiplayer mode.

Unlocked: 23 Dec 2007 20:30:35

Have a 1 to 5 or worse Kill to Death ratio in a multiplayer match.

Unlocked: 23 Dec 2007 20:19:45

Get a triple kill with an explosive during a single Ranked Match - Team Deathmatch.

Get 20 kills with a shotgun in a single Ranked Match - Capture The Flag.

Achieve 15 kills with a sniper rifle in a single Ranked Match - Deathmatch.

Kill the bomb carrier with an assault rifle 5 times in a single Ranked Match - Demolition.

Achieve 5 kills in a row without dying with an SMG in a single Ranked Match - Elimination.

Kill 10 opponents with a machine gun during a single Ranked Match - Team Elimination.

Kill 50 opponents in Ranked Matches with a knife attack from behind.

Host and complete 100 multiplayer matches.

Kill 4 members of the opposing team while carrying their flag. 

Accumulate 50 suicides over Xbox LIVE in any mode.

Be the most skillful player in a Ranked Match.

Accumulate 100 kills with the knife over Xbox LIVE in any mode.