(Reposted from The Supreme Topic of 'Other' Knowledge) Not sure if this deserves its own topic or not, but recently some interesting things surfaced regarding Sonic Jam. No, not the Saturn version, the other one. Released on the failed "Game.com" Tiger handheld. This game was a compilation of sorts, featuring a zone from each of the Genesis Sonic titles. As such, Sega supplied the developers with many assets from the Genesis Sonic games. Some of the assets that they were given also happened to be from earlier in development: Seen above are Tails swinging sprites from Sonic Jam compared with the equivalent sprites from Sonic 3C 0408. These sprites were left unused and were overwritten by Tails's super transformation in later prototypes, as well as the final game. These laughing sprites for Knuckles are also different, styled much more like Sonic Triple Trouble. Then there are the skidding/stopping sprites, which seem to.... wait...what's up with that middle frame? (Credit to Fred Bronze for restoring the sprite) It appears that this frame is leftover from Knuckles's earlier design! Notice how the fist is even reused from the Sonic 3 prototype sprite. And to think that this was hidden away in such an obscure Sonic title all this time. I wonder if there's anything else in here? Prototypes of this game show even more changes: (thanks to TheBlurCafe for finding the prototype images) Mushroom Hill is using different graphics here; the final is almost identical to S&K. In the second image, Knuckles is using a very peculiar sprite, possibly as a placeholder? There's plenty of other changes seen in other pre-release screenshots: Spoiler As terrible as this game is, it might be worth looking into it more simply for the possibility of any prototype content that the developers may have utilized.