All of the musical themes in the game are from works of classical music. But he decided to take that ability away when he saw Bentley's head popping through the roof! The game was programmed in 6502, and Fortran was used as tool for programming.
Originally, FXL designed the game so that Bentley could jump while in a tunnel. The four possible sayings are: OUCH OH NO BYE and #?!. Whenever Bentley is killed, he shrinks, and says something in a cartoon-type balloon above his head. But, Atari ran into trouble over that name from the American Indians and so had to change it. The character 'Bentley Bear' was originally named 'Braveheart Bear' in the released prototypes. The mazes were similar to those in Crystal Castles. It featured a one-legged robot and/or a spaceship placed in 3-D mazes lined with asteroids and the goal was (of course) to shoot them. The game was originally supposed to be a variation on the mega-hit "Asteroids" and the working title was 'Toporoids' (from TOPOgraphics and asteROIDS). Game ID: 136022 Main CPU: MOS Technology M6502 1.5 Mhz) Sound Chips: (2x) POKEY 1.25 Mhz) Players: 2 Control: trackball Buttons: 1 (JUMP) TRIVIA When it first appeared in arcades in July 1983, Crystal Castles amazed players with its sharp graphics and pseudo 3-D mazes. The players sit across from each other on this version, and the on screen image flips over to face whichever player is currently controlling Bentley Bear. But the top glass is nicely decorated and the control panel art matches the upright version.
Crystal Castles is an inventive variation on the maze-driven collect-the-dots gameplay first seen in Namco's legendary "Pac-Man". Arcade Video game published 39 years ago: Crystal Castles © 1983 Atari.