It's been a long, weird road, but it looks like we finally have every bit of Sonic Xtreme ever worked on. A member of Sonic Retro and Assembler has his hands on Ofer's source code for Sonic Xtreme and has successfully built the binary, and is sending it out to a few people to test to make sure the game actually runs. In his possession is the final source, including source codes for the level editor and some files needed to turn your PC into a Dev Kit.Some background on Sonic Xtreme, as many likely don't know the entire story. Sonic Xtreme was Sega of America's project while Sonic Team was working on NiGHTS, it was intended to be THE Sonic game for "next-gen" platforms. The roots of Sonic Xtreme trace back to the Genesis days, when Chris Senn originally pitched the game as an isometric scrolling game:The game wasn't approved as is, but rather proposed to be moved to the then-in-development Sega 32X, under the name Sonic Mars. A pitch video, made on an Amiga 1200, has survived of what they envisioned Sonic Mars running as:Mock-up of the pitch video, and the actual pitch-video:The game was eventually OKed for the upcoming Sega Saturn, where it was positioned to be THE Sonic game for the system. Originally, the SoA team managed to get their hands on Yuji Naka's NiGHTS engine and had intended to use said engine for boss battles on the game:Footage of the NiGHTS engine being used for bosses: https://www.youtube.com/watch?v=Ajuzf79476Y Some executives saw this and demanded the entire game be made with this engine, scrapping an early-in-development normal-stage engine they were working on in the process. Eventually, a small test of this engine leaked as a binary that can run on stock saturns:Early version of the engine, that has leaked. It continued being worked upon, because leaks like this have popped up online:This version featured improved graphics, morphing ground (ala soft museum in NiGHTS), and a 3D sonic. Unfortunately, Yuji Naka got wind that they were using his prized engine, and threatened to leave sega unless they stopped using his work. Rather than lose Yuji Naka, SoA yanked the NiGHTS engine from the team, leaving them about a year into the project with absolutely nothing to show for it.At this point, a third complete rewrite of the game began, and this is essentially the Sonic Xtreme everybody remembers:Several years ago, Chris Senn, one of the lead developers for the game, leaked everything he still had of the project from this build. he revealed in the process that this build of the game was never running on a Saturn, but rather was a PC build of the game by Ofer Alon, the main programmer. Senn had everything from this build except the actual game engine, but that meant not only all the tiles and arts and assets, but also the actual level files. In 2010, SaNIK, at Sonic Retro, built a model viewer for these levels after a few guys, including myself, cracked the level format from these files. His viewer worked with OpenGL and let you clip through the levels and explore them as non-playable representations of the levels themselves. Senn couldn't release the engine as he didn't have access to it, but for the most part, we had everything related to Sonic XtremeSenn released the following videos proving the engine build still existed, though:interestingly, the final video states "Saturn version," which is odd because the game is a PC executable. That didn't make sense... until now.Back in 1995, Sega launched the Sega PC initiative, which would have coincided with Sonic Xtreme's development. The heart of their initiative was a partnership with Nvidia to produce nvidia's first GPU, the NV1. The NV1 is a 3D accelerator video card that, unlike modern video cards, rendered in Quads rather than 3-pointed polygons, much like the saturn. The NV1 also includes Sega Saturn controller ports, and an audio processor making it an all-in-one card for playing Sega PC games. Only 5 games support the card - Virtua Fighter Remix, Battle Arena Toshinden, NASCAR, Panzer Dragoon, and a special version of Descent.The full source for the above versions of Sonic Xtreme have finally leaked and been built. They use the NV1 SDK, which wasn't available to normal consumers of the NV1, to build, which essentially turned your Windows 95 box into a Sega Saturn development kit. Inside the source for this leak are stubs for a Sega Saturn build option. The game looks a good 70% complete, and includes the source for a level editor. The engine will only run on a Windows 95 machine with a Diamond Edge NV1.Senn had long conceded that all the "levels" shown were thrown together in 10 minutes for the purpose of getting some screenshots out to magazines, and exploring SaNIK's model viewer made that obvious, as the levels are meandering without purpose. However, given how relatively complete the engine is, and that the game includes the source to the level editor itself, it wouldn't be out of the possibility for fans to actually complete this game. Next steps would have been finalizing the engine, building some levels, and programming some bosses.The person behind the leak doesn't have an NV1 card himself, but he's built the binaries and is sending them my way to test on my NV1 card. Hopefully I can post some videos of the game running locally at my place soon enough. This is pretty exciting and essentially the holy grail of the Sonic Community.Sonic Xtreme has been unearthed.For me personally, this is the long culmination of years and years worth of research and leads and dead ends. I have personally been looking for this release since about 1999 when I first started speaking to people at Sega and past programmers about this. I had actually doubted we'd ever get our hands on Ofer's engine, this is an incredibly exciting time and I'm pretty honored to be the guinea pig to test this stuff out to confirm if the build is working.Very exciting day, just so happened to coincide with a day I had taken off from work.