This is a native, 64-bit version of Unreal Tournament 2004 for Win64
(or "Windows XP 64-bit Edition", or "Windows for x64", etc).

To install:
- Install the retail version of UT2004 on Win64 from the retail disc(s).
The free demo version will not be sufficient for this. The installer
on the disc is a 32-bit program, but it will run fine on Win64.
- Patch the installation to version 3355 (available from
http://www.unrealtournament.com/). The update program is also 32-bit
but, again, will run fine on win64.
- Unpack this .zip file into the directory where you installed the
game, so that "ut2004-win64.exe" ends up in the game's "System"
directory, "ut2004-win64Logo.bmp" ends up in "Help", etc...
- Run the ut2004-win64.exe from the game's "System" directory.