Here is the full list of all 17 Xeodrifter achievements.
Finish the Game in Under 1 Hour
Collect Health During a Boss Battle
Visit 100% of Map
Finish the Game
Beat Final Boss Without Taking Damage
Collect all Gun Extenders
Collect all Health Extenders
Find Hidden Health
Collect Power-up
Break the Boss's Shield
Manually Stimulate a Sprite
Kill an Alien Bat