Works on x32:
Prince of Persia: Sands of Time - only tweak was to get Xbox 360 gamepad to work through xpadder. Also disable fog through editing settings ini in case you cant see anything at the ingame main menu.
Works on x64:
Tropico 3: Absolute Power
Rome: Total War
SimCity 4 - some tweaking is required i dont remember what I had to do Google your problem
Works on both:
Ninja Blade
Gears of War
Devil May Cry 4
Devil May Cry 3
Tom Clancy's Ghost Recon Advanced Warfighter (GRAW)
Tom Clancy's Splinter Cell
Tom Clancy's Double Agent took forever to get Xbox 360 gamepad to recognize I dont remember how I did it at the end. I think x360ce and some tweaking of that.
Tom Clancy's Rainbow Six Vegas
Tom Clancy's Rainbow Six Vegas 2
Knights of the old republic (Kotor) sometimes runs sometimes requires extreme tweaking
look for my post. Easier to get to run on x32
Final Fantasy 7 (FF7) - forums.qhimm.com
Aali Custom graphics driver as well as other mods.
Fallout Tactics: Brotherhood of Steel
All old Lucas Arts Adventure games - ScummVM download it and play games through it.
Dos based games - try DosBox not everything works but it has a good track record.
as always all game were tested after latest patches available online were installed.