Here is the full list of all 16 Xentron Attack achievements.
Get a bonus life.
Destroy battleship.
Destroy Motherbase.
Destroy Omega Cannon.
Destroy The Champion in Level 36.
Get 100000 scores in 1980 mode.
Collect 50 pilots in Dogfight mode.
Reach level 6 without losing a life.
Pass the docking sequence without docking.
Destroy 10 Snipers without death.
Die within a second.
Get game over without using shield.
Don't let the last smallest meteor to be destroyed for 60 seconds in Standard mode.
Indirectly kill your friend by bumping him into hazards.
Play Co-op and upload the high scores together.
Reach level 36 in Expert mode.