Enclave is a good game to use with your HTPC it has support for HDTV resolutions right out of the box. 720X480, 848X480, 960X540, 1440X480, 1920X540 and not a bad game to boot. You'll want to have a wireless keyboard though as it doesn't support gamepad. GTA3, Jedi Starfighter, Spiderman are also good for HTPC use and work with a gamepad. Have to use 640X480 with these.