Then there's a couple tech demos that can't be ripped because they've never been leaked to the public, like Sonic DS and Sonic Extreme (Xbox skateboarding game). There's an iOS game called Sonic at the Olympic Winter Games that was only available for about a week before being delisted.

There's a pachislot game called Sonic Live!, but I think it's undumped. Sonic X-treme: does this one use models for the stage? The characters are digitized sprites, but is the stage in the demo 3D? Sonic and everything else in them are sprites. The Special Stages of the Saturn version has 3D models, and I believe the PC version has 3D Special Stages, but only the actual Stages themselves are 3D. List of Sonic the Hedgehog Games (or games that contain Sonic) that need to have models ripped from them: (Please tell me also if I forgot any sonic game that has 3d models or, which also includes ports, remakes, etc. This one though since it is on the The Models Resource Page, will focus on models only that need to be ripped from (any and all) Sonic the Hedgehog games that have 3d models that need to be ripped. This will allow for easier communication for those who already rip from sonic games and those that want to as well, and this will lead to more rips from sonic games in the future from Sprites, Textures, Models, and Sounds to much more. I am setting up this thread for anything and everything Sonic the Hedgehog related when it comes to ripping things and the like and to hopefully gather everyone who knows how to rip. There are lots of sonic games out there, but many of them have not been ripped from at all, or only have some rips, leaving many to want rips of these games to be complete. Sonic the Hedgehog Games that need (more) model ripping:

How to extract sonic generations models