Here is the full list of all 42 Soldier of Fortune: Payback achievements worth 1,000 gamerscore.
Completed the Mogaung levels on the hardest difficulty setting.
Killed 5 enemies in 5 seconds in any game mode.
Completed the game without dying on Normal or Hard difficulty.
Accumulated 50 suicides over Xbox LIVE in any mode.
Killed 50 opponents in Ranked Matches with a knife attack from behind.
Killed 10 opponents with a machine gun during a single Ranked Match - Team Elimination.
Killed the bomb carrier with an assault rifle 5 times in a single Ranked Match - Demolition.
Got 20 kills with a shotgun in a single Ranked Match - Capture The Flag.
Got a triple kill with an explosive during a single Ranked Match - Team Deathmatch.
Achieved 5 kills in a row without dying with an SMG in a single Ranked Match - Elimination.
Achieved 15 kills with a sniper rifle in a single Ranked Match - Deathmatch.
Was the most skillful player in a Ranked Match.
Hosted and completed 100 multiplayer matches.
Accumulated 250 dismemberments in any multiplayer mode.
Accumulated 100 kills with the knife over Xbox LIVE in any mode.
Killed 30 enemy flag carriers in Capture The Flag.
Killed 4 members of the opposing team while carrying their flag.
Killed 75 enemies by shooting them in the groin in any multiplayer mode.
Accumulated 100 headshots over Xbox LIVE in any mode.
Performed 300 reloads in any multiplayer mode.
Achieved 50 kills using pistols in any multiplayer mode.
Accumulated 30 kills with a silencer over Xbox LIVE.
Killed 1000 enemies throughout the campaign.
Shot off all 4 limbs on any combination of players over the course of a multiplayer match.
Had a 5 to 1 or better Kill to Death ratio in a multiplayer match (minimum of 20 kills).
Finished a multiplayer match with 100% accuracy (Minimum of 10 kills).
Disarmed 15 bombs in Demolition mode.
Achieved 5 headshots in a row without dying using a sniper rifle in a multiplayer match.
Achieved 25 kills from a distance greater than 100 feet without a scope in any multiplayer mode.
Achieved a 25% vital zone hit ratio in a multiplayer match.
Killed yourself and an opponent with an explosive 10 times in any multiplayer mode.
Killed 10 enemies while crouching in any multiplayer mode.
Had a 1 to 5 or worse Kill to Death ratio in a multiplayer match.
Survived an entire Deathmatch without hurting anyone (minimum of 4 active players).
Completed the game on the hardest difficulty setting.
Completed the game on any difficulty setting.
Completed the Donetsk levels on the hardest difficulty setting.
Performed 500 dismemberments throughout the campaign.
Completed the Llebo levels on the hardest difficulty setting.
Completed the Eshkashem levels on the hardest difficulty setting.
Completed the Al Qa’im level on the hardest difficulty setting.
Performed a dismemberment at every point on the enemies' bodies.