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Yet again Sonic and friends find themselves wrapped up in the schemes of Dr. Robotnik. This time he plans to exploit the power of Chaos, a malevolent being that feeds upon the power of the Chaos Emeralds. In their own ways five heroes will do what they can to save Station Square and, perhaps, the entire world.

The player can select from which character to play after meeting them with Sonic, and each has their own unique version of each level. Sonic's levels involve racing through a level as quickly as possible, destroying any robots along the way. Tails can hover over distances, and his levels are similar to Sonic's except that he must beat an opponent to the finish line. Amy can't charge up ramps or run as quickly as Sonic and Tails, but she does have a giant hammer she can break obstacles with. The goal of her levels is to avoid being captured by a robot sent after her by Dr. Robotnik. E102 Gamma is a slow, difficult to maneuver robot, but it has guns and missiles that can lock on to several targets at once, chaining together attacks and earning a higher score and more time on the clock. The goal of its levels is to reach a boss enemy and destroy it before time runs out. The final character is Big the Cat, a fisherman searching for his lost frog. Big's levels are almost entirely devoid of action or fighting; he just fishes. Each character can find items that increase their abilities as the story progresses, such as a ring for Sonic that lets him home along lines of rings, or improved lures for Big. A final chapter wrapping up the story is unlocked after all other characters have been completed.

Additionally each of the characters can visit the Chao garden where they can raise baby Chaos. By petting, feeding, and showing animals found in levels to the Chaos they can grow stronger, and optionally be put into races against other Chaos. As well each level in the game has additional objectives that can be completed to acquire extra emblems, although the emblems don't do anything in this version of the game. Finally at one time it was possible to go online and download additional levels and bonuses in the game, such a Christmas theme for Station Square and a level sponsored by AT&T, but since SegaNet shut down this is no longer possible.


Sonic Adventure Dreamcast High in the Air
Sonic Adventure Dreamcast Title Screen
Sonic Adventure Dreamcast Loop
Sonic Adventure Dreamcast A cut-scene

Promo Images

Sonic Adventure Screenshot
Sonic Adventure Concept Art
Sonic Adventure Screenshot
Sonic Adventure Concept Art

Alternate Titles

  • "索尼克大冒险" -- Chinese spelling (simplified)
  • "Sonic Adventure International" -- Updated Edition title
  • "ソニック アドベンチャー" -- Japanese spelling

Part of the Following Groups

User Reviews

Sonic's Glorious Return! Dreamcast Classic Nigel (150)
Simply an amazing "killer app". Dreamcast A O (71)
The First Adventure ... Begins Dreamcast Rouge (7)
Without a doubt, the best game I ever played! Dreamcast M.Allen (76)
Could have been great, but... Dreamcast optrirominiluikus (112)
The best Sonic game since S&K. Dreamcast Gary Smith (65)
A classical title, that I will always remember. Dreamcast Kluke (8)

Critic Reviews

Power Unlimited Dreamcast Mar, 1999 9.8 out of 10 98
GameSpot Dreamcast Dec 31, 1998 9.2 out of 10 92
Planet Dreamcast Dreamcast Oct 03, 1999 9 out of 10 90
Adrenaline Vault, The (AVault) Dreamcast Nov 10, 1999 4.5 Stars4.5 Stars4.5 Stars4.5 Stars4.5 Stars 90
neXGam Dreamcast 1999 9 out of 10 90
Consoles Plus Dreamcast Oct, 1999 89 out of 100 89
The Video Game Critic Dreamcast Sep 24, 1999 B+ 83 Dreamcast Nov 04, 1999 16 out of 20 80
SEGA-Mag (Objectif-SEGA) PlayStation 3 2010 8 out of 10 80
Softpedia Xbox 360 Apr 01, 2011 7 out of 10 70


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Many, MANY scrapped ideas from previous Sonic games were put into this game. (eg The boulder, object interaction, etc...)
Contributed to by Riemann80 (18394), Grant McLellan (541) and Crawly (1324)