Sonic Team Publishers: Sega (JP/US/EU),
Tec Toy (BR) Platform:
Sega Saturn Released in JP: June 20, 1997 Released in US: July 31, 1997 Released in EU: August 28, 1997 Released in BR: September 14, 1997
Rather than being emulated, the code from the original games has been ported to the Saturn. Because of this, more substantial changes can be observed compared to other Sonic compilations. Notably, these versions of the games use CD audio.
To do: Not sure if all of these are unused, could someone double-check?
Sonic World is actually based on an early prototype of Sonic Adventure! Sonic Team didn't want to waste the work they did when the game was moved from the Saturn to the Dreamcast, so they just put what they'd finished in Sonic Jam as a bonus for players. So it's no surprise that Sonic Jam's code contains unused animations reflecting the same animations used for Sonic in Sonic Adventure.
Sonic's spring animation, but going diagonally instead of straight up. Matches up with the animation used in the Special Stages of the Saturn version of 3D Blast.
Sonic rolling over, which leads into one of his falling animations. Most likely transitioning out of the previous animation.
An animation of what seems to be Sonic pushing something?
Sonic pushing something to the side, maybe opening a door?
Sonic picking something up from the ground.
What seems to be Sonic pointing at something up ahead.
A longer version of Sonic picking something from the ground, along with him examining it.
Sonic looking slightly forward then moving back.
Sonic holding on to something under him.
Unused Music & Sound Effects
A short, repetitive music loop.
Some kind of honking sound effect.
Behind the waterfall of Sonic World is a piece of sidewalk that can be seen by fiddling with the camera. By jumping at the waterfall's invisible collision at a certain angle, you can clip out of bounds and walk on it, but why is it there...?
Hidden Desktop Images
These can be found by inserting the disc into a computer's CD-ROM drive and looking in the /Extra directory.