Unreal works fine under Windows XP with Service Pack 2

This game runs fine under Windows 2000

This game runs fine under Windows NT 4.0

This Win32 game installs fine and plays great. There is an unofficial patch available with updated OpenGL and Direct3D support. (oldunreal.com)

I had to set Win98/Me compatibility mode for Unreal.exe to run this game properly. Otherwise the game ran like in turbo mode (camera jumps very often and player moves very fast). It's weird that only me and a few people only have this problem.