Sonic Adventure DX: Director's Cut (ソニックアドベンチャー デラックス Sonikku Adobenchā Derakkusu?, lit. "Sonic Adventure Deluxe"), commonly known as SADX, is the enhanced port of the Dreamcast video game, Sonic Adventure. It was released for the Nintendo GameCube and PC in 2003 in Japan and in 2004 in the rest of the world. This version of Sonic Adventure contains several exclusive features and various changes. (sonic.fandom.com)