Director's Cut: Sonic Adventure Dx

The "DX" (Deluxe) tag brought a significant amount of content that wasn't present in the 1998 original:

The Legacy and Chaos of Sonic Adventure DX: Director's Cut Released in 2003 for the Nintendo GameCube, (SADX) was Sega's attempt to bring the blue blur's first 3D masterpiece to a wider audience following the Dreamcast's demise. While marketed as the definitive "deluxe" experience, it remains one of the most contentious entries in the franchise among long-time fans. What’s New in the Director’s Cut? Sonic Adventure DX Director's Cut

Updates the pet-raising system to align more closely with the mechanics found in Sonic Adventure 2: Battle . The Technical Trade-Off The "DX" (Deluxe) tag brought a significant amount

Adds 60 optional tasks scattered throughout the hub worlds and action stages. Updates the pet-raising system to align more closely

Unlockable as a bonus character for those who collect all 130 emblems.