Hi,

I have found a solution to make Dreamfall Chapter works in 21:9 resolution (2560x1080).

1. Open Windows registry to edit values:
- Execute regedit
- Go to HKEY_CURRENT_USER\Software\Red Thread Games\Dreamfall Chapters
- Edit the folling entries:
SavedResolution_h2369894734 -> Edit it with your resolution (2560x1080)
Screenmanager Is Fullscreen mode_h3981298716 -> 0 to be in windowed screen (doesn't work in full screen)
Screenmanager Resolution Height_h2627697771 -> Edit it in decimal with your height (1080)
Screenmanager Resolution Width_h182942802 -> Edit it in decimal with your width (2560)

http://i.imgur.com/Ya2IFl1.png

2. Remove borders from the windowed screen:
Use this program: http://www.mediafire.com/?jnsslpz2wl7yjf8
Tuto: https://www.youtube.com/watch?v=38HK8aiIXzc

I hope it will be helpful.