As a "legacy" title, it is no longer sold on mainstream platforms like Steam or GOG. However, it is preserved for educational and historical purposes on the Internet Archive, which is generally considered a safer alternative to unverified warez sites.
Using unofficial download sites like the one you mentioned carries significant security risks: As a "legacy" title, it is no longer
Legitimate patches and updates typically do not work with "warez" or modified versions of the game. As a "legacy" title
Unverified executables from third-party sites often contain trojans or other malicious software. As a "legacy" title, it is no longer