I don't know if you are being just specific to the video game world, but Dolby Digital is superior and has far ranging support. I doubt there's a DVD player that's been made in the past 5 years that does not support Dolby Digital. Almost every DVD movie itself will support either Dolby Digital or DTS (or both). Most of them support Dolby Digital through an optical conector or a coax connector. HDMI is more recent and typically is found more in the high-def world.