Hi, here is an ebuild for that original claustrophobic classic of motion-sickness inducement, Descent 1. It works with the freely-available demo data.
Created attachment 101557 [details] d1x-rebirth-0.50.ebuild
Bleh... this doesn't use the set CFLAGS... looks like it'll need a little bit of work. Feel free to patch it up, otherwise I'll get to it when I'm on my "commit all the descent stuff" kick this week.
Added to CVS w/ a nice little sed for CXXFLAGS...