This is a tool-assisted speedrun. For more information, see http://tasvideos.org/2501M.html
Sonic Adventure DX: Director's Cut, an enhanced port of Sonic Adventure on the Sega Dreamcast, follows the well-known Sonic the Hedgehog as he races to stop Dr. Eggman's evil plans once again — this time in 3D. A notable feature in the game is five extra story modes for some of the other Sonic characters, including Tails, Knuckles and Amy.
This run by THC98 completes Tails's story, see