

His actions draw the six playable characters to Station Square, where their adventures unfold in a "Rashomon"-Style plot. Though Chaos is weak and anemic in its current state, the Doctor aims to obtain the seven Chaos Emeralds to empower it to world-conquering levels. Eggman shatters the Master Emerald and releases an ancient aquatic creature known as Chaos from its confinement.

The game has an increased focus on story, with voice acted cutscenes telling a much more elaborate plot than previous games. It was released in Japan on December 23rd, 1998, and was localized for North America, Europe and Australia between September-December of 1999. The highest-selling title for the Sega Dreamcast, Sonic Adventure is the first main game in the Sonic the Hedgehog franchise to feature full 3D gameplay.
