Note: This tweak doesn’t enable “true” exclusive fullscreen (the kind older games used). It forces Back 4 Blood into a borderless fullscreen mode that behaves almost the same on modern Windows. You’ll get proper refresh rate switching, lower input latency, and tearing/VRR support. The tradeoff is slower alt-tabbing, since Windows has to juggle display modes.


Head over to the GameUserSettings.ini config located in:

C:\Users\YourUsername\AppData\Local\Back4Blood\Steam\Saved\Config\WindowsNoEditor

Alternatively you can type %localappdata% as a run cmd or path destination.

Open GameUserSettings.ini with a text editor and change these lines to = 0 :

FullscreenMode=1
LastConfirmedFullscreenMode=1
PreferredFullscreenMode=1



Save it and you're all done!

On exclusive fullscreen mode the game stops loading when it's not in-focus. Try not to Alt-Tab during loading screens. Game freezes may happen.

You can also change this line StaticResolutionScale= to scale the in-game resolution.

Originally posted by Scatman :

For anyone looking for help for UWP, I believe the directory is here:

C:\Users\USERNAME\AppData\Local\Packages\WarnerBros.Interactive.e172091a-6630-4ff3-959f-830_ktmk1xygcecda\LocalCache\Local\Back4Blood\WinGDK\Saved\Config\WinGDK