http://bugs.winehq.org/show_bug.cgi?id=16822
--- Comment #37 from Ralph Little littlesincanada@yahoo.co.uk 2011-10-13 11:10:30 CDT --- (In reply to comment #36)
The workaround for this bug is to download winetricks and run 'winetricks dinput8' in the console. You might also need to fiddle with the libraries tab in winecfg (add dinput8 and see if any of the options do anything to help it).
Will do, thanks.
Blacksite Area 51 is a UT engine game. Fixing this issue will likely fix a lot of games based on that technology.