Instructions are available here . Any executable created using files or code taken from this source tree MUST be open source. By using this source, you are agreeing to this term, in the interest of the descent and descent programming communities. The only exception is if the writer of the original source gives explicit permission for the code to be used otherwise. OpenGL support in Linux and windows.
Various windows fixes.
Update all the documentation that was possible. Added a few more things such as keypad quickmenus, hudmessage colorization, and fixed a few bugs. There was no 1.39. Skipped to 1.40 to get the release out the door. New linux sound driver.