Xbox 360 HD DVD Add-on Sells 155,000 Units in U.S. June 25, 2007 Alan Cooke More news on the next gen DVD war. Daily Tech A Microsoft representative told CNET UK that 155,000 Xbox 360 HD DVD add-ons have been sold in the U.S., making it the “biggest-selling accessory” ever sold for the console. By “biggest-selling,” Microsoft may be referring to the overall revenue, as it would seem unlikely that the HD DVD add-on would be more popular than extra controllers. FacebookTwitterEmail tagged with High Definition Optical Discs (Blu-ray and HD DVD)