Here is the full list of all 13 Alien Breed: Impact achievements.
Finished CO-OP Assault level 1,2 or 3 with no player losing a life
Complete "Hydroponics" in Co-op Assault
Finished a single player level without using any items
Finished 'Interface' single player level without using any health packs
Completed the Single Player game on Elite difficulty
Single player completed
Found all secret collectibles
Picked up 100% of the logs
Used all weapons and items in the game
Complete 3 Co-op Assault multiplayer games
Killed 50 aliens in a row without taking any damage
Killed 20 aliens in 30 seconds
Killed a total of 25 aliens in single player