If you install certain modifications or try to map too many buttons to a modern controller, keys.dat can become corrupted. The game will load, but Tommy Vercetti won't move.
1. The Original PC Retail Release (2003) / Original Steam Version keys.dat gta vc
Alternatively, if you are using a digital distribution (like Steam or the now-defunct Rockstar Launcher classic version), look here: If you install certain modifications or try to