Nibbler is a version of Pac-Man, and one of the earlier clones from 1982. There are a few notable differences from the arcade version, however: 1) There are only 3 ghosts in the maze, not 4. 2) When you eat a power pellet, Pacman changes color, not the ghosts. 3) You can stop in the middle of hall (without hitting a wall first). On the whole, not a bad version, considering it's early release (it was already advertised in my earliest Rainbow, which is August, 1982).
Title: Nibbler
Author: Tom Czarnecki (Colorful Software)
Publisher: Nelson Software Systems, later called Colorquest/Softlaw Corp.
Released: November 1982
Requires: Color Computer 1,2,3, 16K RAM tape or disk, joystick.