I'm not a gamer, just use F-Sims, so I don't know any other 64bit games already exist! As there isn't an thread about that, I started this topic. Yesterday evening I received an e-mail from x-plane.org with announcement that X-Plane 10 is now available as 64bit (still in Beta Mode) and is therefore the first Flight Simulator who could run fully in 64bit mode. User of X-Plane 10 could download the 64bit Beta Upgrade for free.
You could also head to Windows Compatibility Center website (Google it) and you can pretty much get a list of compatible software for Win8 and previous versions. Plus X64/X86 compatibility (some results).
This thread is not about any 64bit Software, just for Games! And for sure give other users the chance for to express their view, or what 64bit games they're paying etc., etc.! 64bit Games are rarely available yet!
Hey, just being helpful... no big.. But even that website has gaming compatibility as well. But i get where your going tho..