Downloading "GTA Vice City Ultimate" from third-party, unauthorized sites like Ocean of Games presents significant risks, including malware infection, system instability, and legal issues associated with piracy. This unauthorized modded pack, often advertised as a free full version, is not a legitimate Rockstar Games product and can cause severe computer issues. For a secure experience, obtain the official game via the Rockstar Games Store or Steam, and use trusted community sites for modifications.