Here is the full list of all 10 XenoRaptor achievements.
Kill the first boss
Defeat the dreadnought
Defeat terror fortress omega
Kill 500 enemies with the blaster
Kill 1000 enemies with lasers
Unlock 20 items
Kill 2000 enemies with the chaingun
Score 1,000,000 points
Kill 1000 enemies with missiles
Score 100,000 points