CHAMP Galaxia

The "Classic" mode plays and feels like the arcade machine, with very similar graphics, sound and gameplay: You play a spaceship, moving horizontally at the bottom of the screen, and shooting up at a bunch of Space Invaders-like aliens, which attack you in waves becoming harder and harder with the game. The "Champ" mode is an upgraded version of the classic game with new enemy types -- requiring more than one hit to destroy, or equipped with a cloaking device making them nearly invisible -- and a variety of power-ups for the player, with create an entertaining variant of the original game. Finally, the game features a variety of options -- one or two player modes, three difficulty settings, adjustable game speed, input by keyboard, mouse or joystick (Champ even released a "Champ cable" that allowed you to play the game with digital joysticks), and a high score table to round it all off.