The update is designed for compatibility with Windows (XP through Windows 10) and requires the original game to be updated to version 1.1.
For hunting simulation enthusiasts, variety is the key to longevity. While the base game of Trophy Hunter 2003 Trophy Hunter 2003 Map Pack 197 Maps Update
9/10 (Loses one point for Map #117, which is just a flat grey cube with a single goat.) The update is designed for compatibility with Windows
Most map packs are optional. The became mandatory. Here is why the "197 Maps Update" is still discussed on forums like BeyondUnreal and ModDB : Trophy Hunter 2003 Map Pack 197 Maps Update
The Ultimate Expansion: Trophy Hunter 2003 Map Pack (197 Maps Update)