Baseline (Widescreen) Solution & Issues
Native widescreen support is Vert- and only detects 1280x720, 1280x768, 1280x800, and 1440x900.
Use Gothic ½ — SystemPack. This mod adds native Hor+ support for all resolutions and corrects the aspect ratio of 2D elements. FOV can be adjusted in the configuration file.
FMV cutscenes may be black or not play correctly. If this happens edit gothic.ini in the game's system folder and change scaleVideos=1 to scaleVideos=0
Old manual method (not recommended):
For other widescreen resolutions open up the game shortcut and edit the "Target" field. Add the following...
-zRes:****,****,32
The "****"s represent your desired widescreen resolution with the width listed first. The "32" represents the color bit-depth.
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Eyefinity / Surround Specific Solution & Issues
Same as widescreen. Some HUD elements are at the far edges of the resolution.
4k UHD Specific Solution & Issues