An old version of the layout of Savannah Citadel, found in a backup file from the Unleashed Preview Build from 01/09/2008. You can find this build here: http://forums.sonicretro.org/index.ph...
You can see the layout of this stage roughly matches the level shown on the first leaked trailer of Unleashed: • Sonic Unleashed - Leaked Trailer
The geometry of the level is missing, but the collision and the objects remain untouched. It should be fairly easy to make it playable, but without terrain being visible.
SonicGLVL was used for visualizing the layout: https://github.com/DarioSamo/libgens-...