You're likely referring to the exclusive content that was initially leaked and made available on Mega.nz for Grand Theft Auto: San Andreas.

Would you like to know more about GTA San Andreas modding or speculation on unreleased Rockstar content?

However, Rockstar Games and Take-Two Interactive have a strict stance on game leaks and modifications. Although some enthusiasts explored and discussed this exclusive build, there's been no official confirmation or support from the game's developers.

In 2021, a user leaked a highly modified and exclusive version of Grand Theft Auto: San Andreas, often referred to as the "Mega.nz exclusive" or "San Andreas Ultra KGB" build. This version featured various unreleased and modified game assets, making it a topic of great interest among GTA enthusiasts.