GTA 3 from Steam will run correctly on Windows 10. You will need the widescreen fix to run the game at “true” widescreen.
A Widescreen frontend fix is an option. It will fix some UI bugs (menu fading, crosshair accuracy, etc.) and scale the menu items correctly.
GTA 3 may not capture your mouse.
You can install Dual Monitor Tools and assign a key combo to lock your cursor to one screen.
Setup is pretty easy
- Install GTA 3 from Steam/etc.
- Download widescreen fix and frontend fix. Extract both archives into your GTA 3 install directory (ex: C:\Program Files (x86)\Steam\steamapps\common\Grand Theft Auto 3). Overwrite any files if prompted.
- Launch gta3.exe and install DirectPlay if prompted
- You may need to close Steam and launch gta3.exe directly the first time if the game crashes after installing DirectPlay.