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The idea of Ms. Pac-Man did not come from Namco, but from hackers. The first version of Ms. Pac-Man was created in 1981 by a handful of programmers at General Computer Corporation (Company). The programmers took a Pac-Man cabinet and modified it, calling it Crazy Otto.
The programmers showed it to Midway who were both surprised at the quality of Crazy Otto and were getting upset over the long wait between the original Pac-Man and its sequel. Midway bought the rights for Crazy Otto and added the Pac-Man sprites and iconic name Ms. Pac-Man to the previously bootlegged game.
Namco quickly took note of Ms. Pac-Man's swiftly growing popularity. Midway had not received consent from Namco to publish the game and a legal battle was about to erupt. Fearing a case would be brought against them, Midway and GCC turned over the rights for Ms. Pac-Man to Namco. Afterward, Namco created numerous ports for the home consoles while benefiting from the widely popular arcade game that was quickly becoming a cultural phenomenon in its own right.
Ms. Pac-Man's gameplay does not stray much from Pac-Man's simple mechanics of eating pellets, numerous types of fruit, and power pellets to eat ghosts. However there are a few major changes that would change the gameplay experience between both games.