In the year 2956 AD, a fighting robot named Vastar was developed by scientists in order to protect Earth from the Galaxy Empire.

Ruins of the Statue of Liberty, Mount Rushmore and the Moai (stone heads from Easter Island) appear at points in the game.

The player controls Vastar, a fighting flying robot that can shoot enemies with laser beams.

Vastar is destroyed by enemy contact or strike but it is provided with a shield that must be activated to prevent attacks.

When the shield's energy runs out, Vastar turns itself in an airship that still can shoot laser beams but it's defenseless against strikes.