Visitors from the skies, out to mine the valuable Asteroids from the asteroid belt before humanity has the chance.
- Small UFOs: 64x32. 6 HP. Classic saucer ship. Fast moving and able to steal small asteroids. Fires a small, quick twin laser only capable of moving horizontally.
- Medium UFOs: 128x64. 20 HP. Larger variety of Small UFO. Slow moving, firing a large triple pulse laser only capable of moving horizontally. Mini-boss variation at the end of Level 1-1 has 30 HP and drops the Pulse Laser weapon.
- Large UFOs: 150 HP.
- Mining Blasts: Bombs that attach to large asteroids, creating a large explosion to break it up. Breaks apart any nearby medium asteroids but completely consumes small asteroids, as well as destroying the Danio.
- Centurions: Alien space fighter. Agile flyer, capable of firing sidewinder pattern missiles which explode upon impact with asteroids.