Usually updated to Version 1.2 , which was the final official patch.

Some archives include the music as separate MP3s because the original CD audio is notoriously difficult to get working on modern Windows. How to Use the Archive

A crucial graphics wrapper included in many "all-in-one" zips to help modern GPUs run the game's older DirectX code and prevent physics glitches (like APCs flying into space).

A modified .exe that allows the game to run without needing to mount the virtual disc every time.