The Simpsons​: Mysteries

The Simpsons: Mysteries was a video game made to release on November 16, 2003 for the Xbox, Game Boy Advance and was said to be an idea for the game The Simpsons: Hit & Run, but the game never mysteriously made it.

The Game
The game is a story mode like free-roam game whereas if you played the Xbox and PlayStation 2 versions, you could play as Homer Simpson, Marge Simpson, Bart Simpson, Lisa Simpson, Maggie Simpson, Apu Nahasapeemapetilon, Patty Bouvier, Selma Bouvier, Seymour Skinner, Ralph Wiggum, Clancy Wiggum, Milhouse Van Houten, Agnes Skinner, Krusty the Clown, Waylon Smithers, Jr., and Charles Montgomery Burns, whereas on the Game Boy Advance version, you could only play as Homer and Bart.

Reasons why the game was not released

 * Once you play as Maggie, the music mutes, but not sound or dialogue. This might happen in the game, and due to bad quality, music was bad.
 * Moe Szyslak was cut from the game: his storyline was cut not to make the game worse.
 * Phil Hartman was erroneously credited though he died in 1998, and his characters Lionel Hutz and Troy McClure did not appear. The same went for Russi Taylor and Karl Wiedergott, though they never voiced anyone.
 * Archive audio is used from older episodes, most notably Dan Castellaneta, Julie Kavner, Yeardley Smith, and Hank Azaria, but some new dialogue is provided by the preceding too.