Baseline (Widescreen) Solution & Issues
Select any resolution from the config launcher.
All 2D elements are formatted for 16:9 and will look squished in lower aspect ratios.
In non-widescreen resolutions, the camera takes a step back (dolly out) in menus and cut-scenes. Unusual way of preserving the HFOV.
Performance warning: framerate = game speed !
If the game runs too fast, select higher graphical settings, use a frame limiter... or as a last resort, check the '30 fps' box under Custom options on the launcher.
Do the opposite if versus mode is too slow.
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Native support. UI is 16:9 stretched.
Eyefinity / Surround Specific Solution & Issues
Native support. The stretched UI can be quite invasive.
4k UHD Specific Solution & Issues