Xatrom Command

This is the last boss you have to fight (and the next to last achievement you’ll unlock). The worm boss fires a ring of balls/missels which will have a gap you can dodge between. They move slowly, so it’s easy to avoid them so long as you keep some distance while shooting the boss.

The worm will go underground and move between positions. Look for the red circle on the ground to know where it will next pop up. Just keep shooting and dodging until the health bar at the bottom of the screen runs out, then the achievement will pop.