Because the game is out of print, your best options for a "free" download are community-maintained archives:

Since the game was built for Windows XP/98, you will likely need a community patch to make it run smoothly on Windows 10 or 11. Modern Alternatives

A free Unreal Engine 5 experience that showcases movie-quality graphics. While it was delisted from consoles , you can still download the City Sample through the Epic Games Launcher to explore the environment.

While (2003) is no longer available for purchase through official digital storefronts like Steam or GOG , it has essentially become "abandonware". This means you can often find it on archival sites, though there are some safety and legal considerations to keep in mind. Where to Find the Game