[Not neccesary for the Steam release]

This installer will work on all Windows OS from XP onwards, 32bit and 64bit. You will still need the CD-ROM for this to work.

Contains game update 1.21.

Installs DirectX 9.0c. (Optional)

Installs nGlide glide wrapper, allowing to play the game in 3dfx mode, up to a resolution of 7860x4320. (Optional)

Source: https://github.com/medfreeman/RogueSquadron3DInstaller