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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 PlayStation 3 Dec 01, 2008 7.7 out of 10 77
IGN Australia Xbox 360 Nov 26, 2008 6 out of 10 60
GamesRadar Xbox 360 Dec 03, 2008 6 out of 10 60
GameOver (Greece) Xbox 360 Dec 18, 2008 6 out of 10 60 PlayStation 3 Dec 10, 2008 50 out of 100 50 Xbox 360 Dec 10, 2008 50 out of 100 50
Extreme Gamer PlayStation 3 Dec 12, 2008 4.5 out of 10 45 Xbox 360 Dec 04, 2008 4.5 out of 10 45
GameSpot Xbox 360 Dec 05, 2008 3.5 out of 10 35
Mania PlayStation 3 Jan 10, 2009 D+ 33


Topic # Posts Last Post
Re: LEAST Favorite Sonic game? 8 Slug Camargo (589)
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 Artzei (1246) and Ben K (23897)