EDIT: I just saw a master link on this site at
http://www.widescreengamingforum.com/masterlist.php
that indicates Deus Ex 2: Invisible War
Hack
Vert -
Requires 3rd Party App
But I don't know what those mean??
Hack indicates that a hack is needed, as against native support. 'Vert -' means that it chops off the top and bottom rather than expanding the sides; '3rd party app' means that you need to run another little program to get it to actually do widescreen. However, testing out the 3rd party app later, it didn't work on the European version.
Stretch,
Europe's version of DX:IW was 'prepatched' to 1.2, so we missed out on a lot of the really painful bugs. ;) But even that wasn't exactly a great performer. The first Deus Ex was superb - Invisible War was far too obviously designed almost completely for XBox... :(