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During a fight on one of Dr. Eggman's spaceships, Sonic becomes caught in a nefarious trap! Eggman uses a device to extract the Chaos Emeralds' power, and inverts it, sending a blast to the planet below which shatters Earth into pieces, reawakening a being called Dark Gaia. With Sonic no longer of use to him, Dr. Eggman quickly jettisons him and the now dead Chaos Emeralds into space, where he crash-lands on the Earth below.

Sonic Unleashed is a combination of two types of games: during daytime stages, Sonic is his normal self, with intense speed-based levels that are reminiscent of his original games. When night falls, Sonic transforms into a monstrous, yet powerful 'Werehog' with stretchy arms. In nighttime stages, he must brawl his way through 3D environments crawling with Dark Gaia's minions.

As players defeat enemies in both types of stages, they earn experience which allows them to level both Sonic's normal and Werehog abilities, such as speed, strength, life, combat and so on. There are also 3D hub worlds to be explored during both day and night, with different events occurring in each. Sonic can help the townsfolk with tasks for items and rewards, or purchase items from shops using the rings he's collected throughout the stages.

Sonic's buddy Tails also makes an appearance during stages where they fly his plane. During these stages, you must press the appropriate button sequences as they appear to shoot down any oncoming enemies.


There are no user screenshots for this game

Promo Images

Sonic: Unleashed Screenshot
Sonic: Unleashed Screenshot
Sonic: Unleashed Screenshot
Sonic: Unleashed Screenshot


Alternate Titles

  • "Sonic World Adventure" -- Japanese title
  • "ソニック ワールドアドベンチャー" -- Japanese spelling

Part of the Following Groups

User Reviews

A decent sonic game I have been waiting for long time Xbox 360 Mario Duenaz (32)
The Werehog appears Xbox 360 TalesOf777 (12)

Critic Reviews

Gamer 2.0 Xbox 360 Dec 01, 2008 7.7 out of 10 77
TeamXbox Xbox 360 Nov 25, 2008 7 out of 10 70
Gamezone (Germany) PlayStation 3 Dec 29, 2008 5.8 out of 10 58
PSX Extreme PlayStation 3 Dec 20, 2008 5.6 out of 10 56 Xbox 360 Dec 29, 2008 48 out of 100 48
IGN Xbox 360 Dec 02, 2008 4.5 out of 10 45
Game Revolution Xbox 360 Dec 10, 2008 C- 42 Xbox 360 Feb, 2009 4.2 out of 10 42
GameSpot (Belgium/Netherlands) Xbox 360 Dec 23, 2008 36 out of 100 36 Xbox 360 Feb 07, 2009 2.8 out of 10 28


Topic # Posts Last Post
Re: LEAST Favorite Sonic game? 8 Dr. M. "Schadenfreude" Von Katze (580)
Oct 30, 2011
LEAST Favorite Sonic game? 10 George Stephen
Oct 30, 2011


There is no trivia on file for this game.

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Contributed to by Ben K (23038)