Atari 400/800
Developed by Atari in 1984 but never released. A pirated prototype of the ROM has been around almost since the game's cancellation. Some versions contain a bug in the later levels where not all of the gates can be opened with every key. This version had also been planned for release on the Atari 5200.
Commodore 64
Developed by Beam Software and released by Thunder Mountain in 1988. Considered very accurate.
Game Boy Color
Never released as a single game, but included as part of the Game Boy Color conversion of Ms. Pac-Man as a bonus game. This version has also reduced the size of the maze. Like the conversions of Pac-Man and Ms. Pac-Man for the Game Boy, you can choose between two views when you play, a full sized view that scrolls, and a half sized view that fits the whole screen. On the full sized view you cannot see your score, or the amount of lives you have. However, you can see which stage you are on by looking at the items Pac-Man is eating. Released by Namco in 1999.
IBM PC MS-DOS
Developed by Beam Software and released by Thunder Mountain in 1989. There is a separate CGA and EGA version (CGA version shown here).