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Proto:Sonic Unleashed (Xbox 360)

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This page details one or more prototype versions of Sonic Unleashed (Xbox 360).

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The Xbox 360 Preview build of Sonic Unleashed is a debug build from in between the E3 demo and final build, predating the latter by almost two months. Unfortunately, only the first disc of this build has been found and dumped, and the second is most likely lost, but even the disc that we have has a wealth of differences compared to the final. The build date is unknown, but three were found.

  • Disc Label: 1/09/2008 (September 1st, 2008)
  • XEX file: 31/08/2008 22:41:02 (10:41:02 PM, August 31st, 2008)
  • Developer Menu: Revision 6005 06:50:59 4/21/2008 (6:50:59 AM, April 21st, 2008)

All the build dates are different, but we can estimate it. The Dev Menu seems to be "subversion", explaining the odd build date. The disc was burned on September 1st while the XEX file is dated August 31st, suggesting the disc was burned the next day.


Sound Differences
Lots of placeholders.
Cutscene Differences
Somewhat unfinished at this point, with many visual changes and missing sounds.

General Differences

  • This build targets 60 frames per second, unlike the final Xbox 360 release and like the final PS3 release. Despite this, much like the latter, it very rarely manages to stay at that cap.
  • All upgrades are unlocked from the start, and the player's stats are always maxed out, likely for testing purposes.
  • Early versions of the game's DLC is included in here, likely explaining why the build couldn't fit on one disc.

Graphical Differences

  • While the HUD in the Hedgehog levels is mostly finalized, the Werehog still uses the earlier HUD from the E3 build.
  • The homing reticle hasn't been changed from E3 yet.
  • Sonic's model has been updated since E3 and uses the final model, but still retains certain particle effects such as the jumpball effect.
  • This version contains the higher resolution global illumination maps that are normally bundled with the DLC.

Early Savannah Citadel

To do:
  • Upload a screenshot of the collision in a level editor.

While the level model and textures are missing, the collision and object layout for a version of Savannah Citadel resembling an early trailer can be found. This is because the collision file is separate from the level model file.

Debug Commands

Install? Menu

To access, press Left on the title screen.

Sequence Check Menu

Can be accessed by pressing the Left Stick and X pressing again closes it.

Developer Menu

Press LB, RB and B to access the Developer Menu, pressing it again will exit it.