Sonic Xtreme has been seeing quite the resurgence as of late, but this takes the cake for the most impressive release to date.
Forum member Andrew75 announced the release of never before seen iteration of Xtreme head programmer Ofer Alon’s V037 NV1. This is a PC port created by Jollyroger and it packs a staggering 150 stages to play around with, most of which never before seen. Andrew does mention that a number of these stages are simply just reskins of other stages in the list, but with either new textures or with some setting changed for testing. Most of these are just test levels after all.
For a full breakdown on changes and download links, direct your favorite point and clicking device to this little bit of text.