I'm a software developer (for backend Linux systems... definitely not a game developer), and am curious about some of Xenonauts development practices. Like, what language is it being written in? And does the engine use either OpenGL or DirectX (i.e. is there any possibility of eventually porting it to platforms other than Windows)? And do you guys unit test? I'm a big supporter of unit tests, but have never really thought they'd make as much sense for video game development (where so much of the code is UI) as they do in other contexts. I get the impression that game shops generally use QA teams instead of automated tests. Also, what, if anything, do you use for version control (i.e. subversion, git, etc.), and do your artists commit directly to it too?