It doesn't appear to be just a scam. The sourceforge repository (
here) has a lot of work in it. Valid Unreal graphics stuff, game logic, physics, you name it.
It's not a usable game, by any means, but they appear to have been doing
something for the last few years.
Their stance on the rights is kind of silly, but the idea is essentially that their video game will simply implement the pen & paper rules directly, and allow you to run a server in which to run shadowrun table games. noncommercial transference. It all breaks down, of course, because there are defined electronic game rights, and they're licensed entirely to Smith and Tinker.
Personally, I kind of love the idea of an open-source pen and paper RPG "simulator", where you could rig up situations and let em run, or play through modules with nice graphics, but I think any such attempt will run into the problems the first Neverwinter Nights had, which is that RPG rules aren't actually sufficient to construct a 3d physics simulator, so you end up houseruling a lot of things, and walling off others that are too hard to model. (you're not going to see a Knowledge or Build/Repair skill used properly in any videogame anytime soon).
Plus the project is the hobby of some dudes that apparently have day jobs and haven't checked much in recently, so, hopes are low in that sector.