Here is the full list of all 17 Alien Shooter achievements.
Buy all weapons
Buy all implants
Collect 1000000 scores in survive
Collect 500000 scores in survive
Collect 100000 scores in suvrive
Kill 10000 aliens
Kill 1000 aliens
Kill 100 aliens
Collect 200000 money
Collect 10000 money
Collect 60000 money
Destroy 3000 barrels
Destroy 5000 crates
Destroy 1000 crates
Destroy 100 barrels
Destroy 1000 barrels
Destroy 100 crates