Before diving into fixes, understand the enemy. The error isn't random. It stems from one of three core issues:
It works on Windows 11 24H2, Linux (Proton), and even Windows on ARM.
: Right-click the game’s executable ( gta3.exe ), select Properties , go to the Compatibility tab, and check "Run this program as an administrator".
Fixes:
GTA 3 is looking for a very specific folder path. If the folder doesn't exist, the game won’t create it—it will just say “Save Unsuccessful”. You must create it manually.