see summary
Created attachment 16660 [details] obsidian-1.9.1a.ebuild Here's the start of an ebuild for this thing. Unpacks and does some minor seds to the top-level Makefile. This is a long way from working though. The source looks to be in really bad shape.
welp, i missed this warning on their website: WARNING - UNSUPPORTED CODE OBSIDIAN is now a parked project, and no further work will be done on it. Feel free to use this code and study the thinking behind it, but we do NOT advise using it as the basis for any virtual world projects you may have in mind.