Hot Coffee Mod

The Hot Coffect MOD is a built in mini-game, in the 2004 Grand Theft Auto: San Andreas game, develpoed by Rockstar North. The mini-game included the sexual relationship between Carl Johnson and his girlfriend, where his girlfriend invites Carl into her house for a 'coffee' (used as an euphemism for sex). 
The Hot Coffee mini-game was supposedly inaccessible but when the MOD was released for the PC version of the GTA game the MOD was discovered. Once people knew about it's existence a hacking tool was used to enable it on the Playstation 2 and Xbox versions of the game too. Once the public knew about the mini-game, a lot of controversy was caused. Lawmakers and politicians forced Rockstar to re-rate the game because the adult content within the mini-game meant young gamers could not play the game, so the game was re-rated as an 18 and had to be taken of the shelves for a while until the newly updated version was released. Although the minigame meant Rockstar and GTA games were negatively shown in the media for a while, it also meant that it would get the company known so may gain some popularity, increasing the sales long term.