Baseline (Widescreen) Solution & Issues
Unmechanical will launch at your native resolution, even though only res's up to 1920x1200 are listed in the options menu.
The Vert- FOV can be fixed by binding corrected values to keyboard commands:
Documents\My Games\Unmechanical\UDKGame\Config\UDKInput.ini
Add the following line at the end of the [Engine.PlayerInput] block:
Bindings=(Name="X",Command="FOV xxx")
Bindings=(Name="C",Command="FOV ccc")
Replace xxx and ccc with these FOVCalculated values pertaining to your display's aspect ratio:
Default xxx FOV is 75 (gameplay)
For 16:10 use 85.28
For 16:9 use 91.31
For 15:9 (1280x768) use 87.61
Default ccc FOV is 90 (intro cinematic & main menu backdrop)
For 16:10 use 100.39
For 16:9 use 106.26
For 15:9 (1280x768) use 102.68
Launch a game. Press c during the intro to fix it. Press x to fix gameplay.
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Eyefinity / Surround Specific Solution & Issues
Same method:
Default xxx FOV is 75 (gameplay)
For 15:4 use 130.28
For 48:10 use 140.2
For 48:9 use 143.91
Default ccc FOV is 90 (intro cinematic & main menu backdrop)
For 15:4 use 140.85
For 48:10 use 148.95
For 48:9 use 151.93
To force the game to run at a single-screen resolution, you can edit ResX= and ResY= in Documents\My Games\Unmechanical\UDKGame\Config\UDKEngine.ini
Level architecture was not made for superwide FOVs, so funny things can happen at the edges of the display.
The mouse-centric menus are partially broken. You can't adjust options and have to Alt+Tab out of the game and close the program manually to quit playing. Bezel-compensated 48:9 resolutions might even prevent you from clicking Continue. (Protip: try playing in a 15:4 window)
4k UHD Specific Solution & Issues