Beta version 0.99a of Botworld. Extract the contents of this file into your UT2004 directory, so that you end up with UT2004/Botworld/Maps, UT2004/Botworld/System and so on. Then load up UT2004 and click the Community button on the main menu. The mod should be listed in the list of user mods. For full instructions on how to play the mod see the botworld_readme.text file in the help folder.