Linux support has stop for now but it still work on ubuntu 16.04 am sure josh will start support Linux again later but i have to say it hard to support all version out there.
i think it looks small scale of games as most of them are by India programmers but some of the stuff josh did with nasa is large scale, but you need a team of people not one person to do that type of stuff. fallout was a team of 25 to 100 people to make the game. not something one person can do
forgot to say check out the zone that not bad map show what the engine can do and it a good size as well