During the progress of Darkness: The full game, I decided to patch a couple of annoying things in the demo!
Start Video, it should now play fullscreen.
All maps are compiled in HDR now.
Level transition brushes were added so props from previous levels unload.
Changed the chapter thumbnail files.
The chapter title does not load correctly, probably because the game's title has spaces in it.
In the final level of the demo, the words "A. I. Disabled" may show up. I figured out how to fix it when working on the full game, but for whatever reason I can not get it to go away in the demo.