Orbitron is a shoot 'em up game released by Signatron USA in 1978. The game is a space-themed game, where the player must defend a planet from incoming asteroids and enemy ships. The game has a circular screen, where the player can rotate the planet and fire in any direction. The game also has a radar, which shows the position of the enemies and asteroids. The game is similar to Asteroids, but with a different perspective.