Because of some problems I had with the game and Desura today I googled for a few solutions (and was able to solve all problems). While googling, I've stumbled upon the phrase "We don't have access to our engine's source code" multiple times in connection with Xenonauts.
And...
Well...
What's the story behind that?
It seem really weird that the developers of a game are developing it without a source code.
What happened?