Rally-X is basically Pac-Man with cars. It's also the first game to feature a bonus round, and background music.
- Enter Service Mode.
- Keep BUTTON 1 pressed and enter the following sequence: Up (×2), Down (×7), Right, Left (×6).
- If entered correctly, this message will appear at the bottom:
© NAMCO LTD. 1980
New Rally-X retains this Easter egg, with the same text.
In 1981, the game was reprogrammed to fix some bugs and renamed New Rally-X. This version was published by Namco worldwide. This also featured the new theme song that everyone knows and love today.
The title screen was edited slightly, removing the introduction in favor of the game's title.
The cars were given a different look. Note that the red car's palette is altered.
The rocks were given a different palette.