How do I run Deus Ex: Human Revolution in windowed mode?

Question

I've been poking around in the options menu, trying to find a option for window mode. But, I can't seem to find any.

So, is there any way to get this game running in windowed mode?

Answer

Fullscreen is not supported out of the box but there is a dirty hack:

1. regedit in cmd

2. look for folder computer\H_KEY_CURRENT_USER\Software\Eidos\Deus Ex: HR\Graphics

3. look for fullscren (double click, set value to 0, LEAVE REGEDIT UP)

4. open explorer to steam>common>deus ex: human revolution folder

5. Hold left shift while double clicking dxhr.exe

Important Notes

1. You have to run this in DirectX 11, anything else seems to make it exremely bright for no reason.

2. Do not alt-tab, ever. ever, EVER, EVER!

3. You may have to repeat steps 3 to 5 (which is why you leave regedit up)

4. You will most likely have to keep repeating this process, I saw someone on reddit earlier say it wasn’t working, you just gotta keep at it brosephs

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