Star Force (encrypted, set 2)

Star Force is a single-player, vertically-scrolling shoot-em-up in which the player pilots a spaceship called the 'Final Star' over series series of islands floating in outer-space space and must destroy waves of enemy spacecraft and ground-based targets.

Special symbols appear at regular intervals that can be shot or collected for bonuses and power-ups. The Final Star is only equipped with forward-firing guns but these can be upgraded occasionally by collecting the relevant power-up. This resembles a small space ship and doubles the length of the Final Star, while also increasing its fire-power.

The stages in Star Force are designated by letters of the Greek alphabet and each has an end-of-level guardian in the form of a Greek letter that must be defeated to progress to the next level. The guardian moves down the screen and if the player fails to destroy it before it disappears from view, they will have a play a little more of the level in order to reach the guardian again.