Ms. Pac-Man (Genesis)
This game has unused graphics.
The Genesis version of Ms. Pac-Man is, oddly enough, a port of the unlicensed NES port with "improved" graphics.
A row of numbers in boxes, a lot more than the SNES version has.
An earlier Game Over message, with flat, red letters instead of white, shaded letters. It uses the same font as the AmigaDOS 1.x series of operating systems.