This is a highly compressed, pre-installed "rip" version of the game originally distributed by RexaGames. It was beloved for its small file size and the fact that it didn't require a lengthy installation process. However, the original RAR archives often threw CRC errors or crashed upon startup.

Repacks from sources like Rexa Games often integrate several community-made "solid content" fixes that are required for a stable experience: SilentPatch:

: Removing the need for official launchers or original discs. Improve Compatibility : Including community-made patches (like SilentPatch

If the mouse stops working, open Task Manager , go to the Details tab, right-click gta-sa.exe , and set Affinity to only CPU 0 . Resolution and Gameplay Fixes Grand Theft Auto: San Andreas Free Download (Build 459558)

If the above process sounds tedious, you have two options:

Searching through forums and sites like RexaGames for a version of San Andreas that wouldn't crash during the "Wrong Side of the Tracks" mission [2, 4].