Here is the full list of all 12 Alien Breed Episode 2: Assault achievements worth 200 gamerscore.
Found all secret collectibles
Single player completed
Single player completed on Elite difficulty
Picked up all the logs
'Primed' completed with a score greater than 300,000
Killed 1000 aliens
Achieved a balance of 20000 credits
Completed multiplayer level 'Cargo' in 10:00 or less
Multiplayer level 'Cargo' completed without taking any damage
Multiplayer Level completed
Lasted more than 8 minutes on a Single Player Survivor level
Killed 50 aliens in a row in single player without taking damage