SpaceMan 99 works with all versions of Windows later than Windows 98. SpaceMan 99 also works with Windows 95, provided Internet Explorer 4.0 or later is installed.
SpaceMan 99 will not work on any 16 bit versions of Windows such as Windows 3.1, nor will it work on Windows NT 3.51 or earlier.
SpaceMan 99 has been tested on the following: