13 - Ms. Pac-Man
Keeping with the trend of ported arcade games, Ms. Pac-Man is an oddity among oddities. To begin with, it was first conceived as an enhancement kit called "Crazy Otto" for the original Pac-Man arcade cabinets by programmers at the General Computer Corporation. When legal troubles forced them to halt, they decided to sell the game as a whole. Thus, with a few changes, Ms. Pac-Man was born.
Whereas the original Atari 2600 version of Pac-Man was a (very) poor port, the port of Ms. Pac-Man was nothing if not stellar and crisp. Of everything included in the arcade cabinet, the only thing missing from the Atari 2600 version were the intermissions. That means that four different mazes, different-colored ghosts, fruit, and even an animated title screen made the jump to consoles, and that's none too shabby, especially considering how much was cut from the original Pac-Man port.