Like many of its genre, the objective of the game was to defeat an alien invasion using a lone space ship. You controlled your ship from a 3rd person view on rails, progressing through multiple stages defeating alien ships.
I can remember a few very specific details:
- The intro scene shows your spaceship being launched from a space station following a runway lined by floating lights.
- The game over scene shows Earth getting obliterated by a giant beam weapon.
- The first few stages were set in space, but some of the later stages starting from the 5th were set within Earth's atmosphere.
- One of the bosses was a machine that clung to the inside of a tunnel-shaped structure using its limbs