A bizarre but confirmed conflict exists between the Windows language hotkeys and the game.
The Definitive Edition has native controller support. If Steam Input is forcing controller emulation, it might be disabling keyboard support. Gta Vice City Definitive Edition Keyboard Not Working
Now that we know the "who," let's hunt down the "how" to fix it. A bizarre but confirmed conflict exists between the
: The remaster appears to lack official support for older operating systems, frequently resulting in dead inputs. Administrator Conflict or PowerToys can intercept keyboard inputs.
If every technical fix fails, you can exploit the game's control mapping system. The Definitive Edition allows you to swap inputs.
Apps like Logitech G Hub , Razer Synapse , AutoHotkey , or PowerToys can intercept keyboard inputs.