Music licensing issues appear to have struck the 2004 Grand Theft Auto: San Andreas, requiring a change to the edition offered on Steam. Sadly, it looks like it wasn't just music files that were removed with RockstarNexus reporting
users finding their old save files being wiped after the update.
Grand Theft Auto: San Andreas is being replaced on Steam by a new edition that removes songs, in addition to some other minor feature changes, reports RockstarNexus.com. The new Steam version adds support for Xbox 360 controllers and removes several resolution options — including 1920x1080, which had been implemented with a patch previously (that one has left us scratching our heads). More concerning is the fact old gamesaves are incompatible. Loading an old save simply starts a new game.
Additionally, 17 songs from the original soundtrack have been removed, apparently because the licensing expired. Grand Theft Auto: San Andreas just celebrated the 10th anniversary of its launch (October 26th), and such a case happened as well when Grand Theft Auto: Vice City passed its 10th birthday in 2012. Its PC edition was temporarily removed from Steam, with music licensing cited as the reason. It later reappeared.
For the full list of changes from the controversial patch, check out this link