The solution removes all black bars in ultrawide and wider without reducing the vertical field of view.
- Download the ultrawide archive below.
- Unpack it to \Brothers\Binaries\Win64 inside the game folder.
- In the game, make sure the window mode is set to Borderless and applied.
- Alternatively, download the resolution enforcer to have the game use your desktop resolution in every window mode.
To uninstall the fix, simply remove or move the files.
Note that the game contains at least one pre-rendered cutscene, which will remain windowboxed.
Tested on Steam and GOG at 2560x1080, 3440x1440, and 5120x1440.
You can buy me a coffee, become a patron or even donate crypto if you like my work.