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If you want the classic experience without the "Definitive Edition" glitches, buy the original version directly from the Rockstar Store when it is on sale. It runs on modern Windows 10/11 with a few fan patches. Buy an old physical CD-ROM key on eBay
Grand Theft Auto: San Andreas is not available for direct, legal download from Uptodown for PC . While Uptodown is a popular platform for Android APKs and some desktop software, GTA: San Andreas GTA: San Andreas