Asteron is an Asteroids variant where the player has to keep open a vital space lane needed for the Terran space system. Asterons, the Terran's enemies, have sent asteroids which the player has to clear out. Like in any other version of the game the player controls a space craft that uses a thrust control to move around and can rotate and shoot in any direction. Asteroids that are shot spilt into smaller parts until they have completely been destroyed. After a while the Asterons will send a flying saucer that attempts to attack the player. The game can be played with either paddle or keyboard. The player has three lives and when they have been used up the game is over.