Games that Work:
---------------------
Age of Wonders 2
Aliens vs. Predator Gold (easiest fix is the new, ported executeable)
Battlezone I & II (both need the "Vista tweaks")
Company of Heroes
Counter Strike: Source (can join games, but can't host for reason)
Diablo II with Lord of Destruction expansion
Dawn of War Gold Edition (DoW and Winter Assault exp.)
Dawn of War Dark Crusade
Left 4 Dead
Lord of the Rings Online
Neverwinter Nights (no problems so far)
Sins of a Solar Empire
Star Wars: Knights of the Old Republic (has always had problems, so it takes work to get it running properly)
Starcraft (game works fine, but menu screens are corrupted and Xfire messes up all screens)
Team Fortress 2
Warcraft III with Frozen Throne expansion
Games with Issues:
--------------------------
Dungeon Siege -- Haven't found a fix for this, yet
STEAM -- Has a few kinks to work out
Xfire -- Has a few kinks to work out
Games That May Cause Problems:
----------------------------------------
Old DOS games (latest version of DOSBox seems to work well)
Outcast
System Shock 2 (this one was hard to run on XP, much less a newer OS)
Ultima IX
Windows '95 games (I still have a bunch of these -- lack of DirectX 6 support is a big problem)
-Khalaq