Sega Drops Early Sonic Adventure Concept Art That Shows An Entirely Different Vibe

Sega shared archived concept art for Sonic Adventure, showing an early, more cartoonish direction for the game.

The unused character and environment designs differ sharply from the final Dreamcast-era look.

The art suggests Sonic Adventure once leaned closer to the style of Sonic CD before Sega finalized the 3D redesign.

It offers a rare glimpse into how one of Sonic’s most influential games evolved during development.