Asterion

Asterion is an unlicensed variant of the shoot-em-up Astro Fighter. The player controls a spaceship and must shoot down the enemy ships before they reach the bottom of the screen. The enemy also fires projectiles which must be avoided. Each wave must be fully eliminated or they will re-appear at the top of the screen. The player has limited fuel which serves as a timer. After several waves the player can defeat the mothership and replenish their fuel.