If the game crashes at startup, it is recommended to delete the modded files or the gta_vc.set configuration file to reset the game to its default state. Distinction from Official Data Files
Some users also report that a missing keys.dat can cause the base game to hang on certain loading screens, such as "Vice Beach, outside Ken's office," particularly if the game was previously modded or is being launched through the trainer's executable. Common File Locations
If you are seeing errors related to this file, follow these steps:
Sometimes Windows prevents trainers from reading the .dat file due to permission issues.
C:\Program Files\Rockstar Games\Grand Theft Auto Vice City (or your custom Steam/Epic Games installation directory).
The file is typically bundled with the GTA Vice City Ultimate Trainer v2 or similar mod packages.