Entertainment Software Rating Board
Some publishers of games decide to tone down the game's explicitness in order to qualify for an "M" rather than an "AO" rating. For example, the game Grand Theft Auto: San Andreas had an original M rating, but the game that could be unlocked by bypassing the patch, called "Hot Coffee", seemed to spark major controversy  with the game, because it features sex and erotica. Thus, the ESRB decided to re-rate the game as an AO. Rockstar Games then chose to leave the game out of the release, then release an exploit fix that completely disallowed access to the game. However, other games have trouble being "toned down". Thrill Kill, for instance, was given an AO, and then Electronic Arts decided to purchase the publisher, Virgin Entertainment. The release of the game was then canceled, and the game never was toned down.