Because keys.dat is a binary file, you cannot simply open it in Notepad to change a "W" to an "Up Arrow." You would typically need a hex editor or, more commonly, use the in-game "Redefine Controls" menu to overwrite the data within the file. Managing Your File
You edited keys.dat manually with the wrong syntax. Fix: gta vice city keys.dat
If your file is missing or broken:
Grand Theft Auto: Vice City , there is actually no file natively named used for player controls. While the game uses various .dat files to define map data (like gta_vc.dat ), keybindings and configuration settings are stored in a binary file called gta_vc.set . Because keys