Unfortunately 21:9 support for Before the Storm never came out, and all the existing patches for the game seem to break online support. So I created a non-intrusive plugin that utilises BepinEx to add your current monitors full resolution to the game if it isn't already there. And dynamically sets the aspect ratio to accomodate. This means any combination of aspect ratios is supported including 16:10, 21:9, and more.