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Sonic Unleashed (Xbox 360)

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Title Screen

Sonic Unleashed

Also known as: Sonic World Adventure (JP)
Developer: Sonic Team
Publisher: Sega
Platform: Xbox 360
Released in JP: February 19, 2009
Released in US: November 20, 2008
Released in EU: November 28, 2008
Released in AU: November 27, 2008

AreasIcon.png This game has unused areas.
DevTextIcon.png This game has hidden development-related text.
GraphicsIcon.png This game has unused graphics.

ProtoIcon.png This game has a prototype article

So very stubbly.
This page is rather stubbly and could use some expansion.
Are you a bad enough dude to rescue this article?

Sonic Unleashed almost seems to have made Sonic the Werehog games fun, but they added a hedgehog.

E3 Title Leftover

SU BG Demo.png

In the ISO, there is a file called This was (obviously) used at E3. Everything inside the package is identical to the final. The only leftover is

Level Changes

These sections of levels were abandoned by changes in the level design, but can still be found via glitching. Strangely, there were later used in modified forms in the Adventure Pack DLCs.

To do:
Rewrite these sections and add screenshots. Right now, they're straight from Sonic Retro

Jungle Joyride Act 1 Night

After the Goal Ring in Jungle Joyride's main Night stage, there is a sealed door. By using the wall-walking glitch, it is possible to cross through this door. There is a large, unused, empty chamber within. If accessed from the ghost mission instead of the main level, the door will be open, and there will be objects within. There is a tree which can be knocked down and used as a bridge, floating platforms, and switches that raise the water level. The platforms and the kill zone raise, but the room's unique water level puzzle is clearly unfinished- the water graphics remain in place. At the top of the room, there is a door. Beyond the door is an ornately detailed chamber containing the original Goal Ring. This area was eventually used, with some changes, for the DLC Act 3.

(Source: Sonic Retro)

Arid Sands Act 1 Night

After the Goal Ring in Arid Sands' main Night stage, there is a sealed door. By jumping onto it from a well-positioned water barrel and using the uppercut, followed by the midair Y-Y-A combo, you can fall into an unused canyon area. It's empty, but you can open the sealed door from the other side. Bring water barrels to the bottom of the chasm, stack them, and do an uppercut-grab to go on. There is a huge chunk of level which is empty. Go on through it. There are, among other things, two pillars you can knock down, which don't appear elsewhere. Eventually, you will reach a pit, which is uncrossable without objects to bridge the gap. Beyond it is a fairly large stretch of level, leading up to the Gaia Temple. This area was eventually used, with some changes, for the DLC Act 3.

(Source: Sonic Retro)

Region Names

The filenames for many of the game's regions differ from the names used in the game itself. Some of them are actually named after real-world locations.

  • Adabat - SouthEastAsia, Sea
  • Apotos - Mykonos
  • Chun-nan - China
  • Eggmanland - EggManBase
  • Empire City - NYCity
  • Holoska - Snow
  • Mazuri - Frica, Clay Castle
  • Shamar - Petra
  • Spagonia - EuropeanCity, RedRoofs
(Source: Sonic Retro)