If you missed out on Sonic Adventure for the Sega Dreamcast back in 1999 or the enhanced Sonic Adventure DX for the Nintendo GameCube and PC back in 2003 and 2005 respectively, then you're about to get another chance to explore the world of Station Square in one of the last true decent Sonic the Hedgehog games. The game has turned up on the behind-the-scenes testing versions of the Sony PlayStation Network and Microsoft Xbox Live Arcade, but it's gone now. Lucky for us, a few screenshots and details escaped before the Powers That Be removed it. Kombo has the breakdown of what to expect when the time comes.
[T]his is a direct port of the PC version of Sonic Adventure DX Director's Cut. This version that originally came out on the Gamecube included slightly improved graphics from the Dreamcast version and extra content like ports of the Game Gear Sonic games. Although Sonic Adventure on XBLA is in 720p, it's set to 4:3 ratio with borders. Other reports sate that the game is quite buggy and doesn't run at 60 frames per second. This is however probably not the official release.
I sincerely hope this is an early build on display and not the final product. Despite owning the GameCube version of the game, I would be interesting in taking another run through the game if it ran in high definition widescreen with the annoying glitches and frame rate drops fixed. Moreover, I understand why the PC version is being ported rather than the GameCube version, but can't Sega tune up the visuals to bring it up to the superior version's specifications? I don't expect a complete overhaul, of course, but I would like to see last generation's updates at least matched. The Game Gear games would be a nice bonus, but aren't necessarily required as long as the total price is right.