Sonic Adventure 2 HD and Nights HD are both now available for download on Xbox Live. The games were supposed to be released yesterday, but XBL users received and error message when trying to download the game into their queue. The games couldn’t be found when searching for them through the dashboard either. SEGA said yesterday it was aware of the issue and was looking into the matter. Apparently the issue has now been solved. Via: Venture Beat, Major Nelson.