Baseline (Widescreen) Solution & Issues
The Game offers all resolutions but only 4:3 aspect ratio - you need to HEX edit to get it HOR+.
This Solution is based on a GOG Version! Steam does not allow code modification.
Open fforce.exe in a Hex editor - you need to change 3 OFFSETS:
16:10
Offset
2A9820: 00 00 40 3F --> 00 00 20 3F (Aspect Ratio)
2A9820: CD CC CC 3E --> 1F 85 EB 3E (FOV)
2B0030: AB AA AA 3F --> CD CC CC 3F (Aspect Ratio Menues)
16:9
Offset
2A9820: 00 00 40 3F --> 00 00 10 3F (Aspect Ratio)
2A9820: CD CC CC 3E --> 48 E1 FA 3E (FOV)
2B0030: AB AA AA 3F --> 39 8E E3 3F (Aspect Ratio Menues)
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
21:9
Offset
2A9820: 00 00 40 3F --> 00 00 D6 3E (Aspect Ratio)
2A9820: CD CC CC 3E --> 8F C2 15 3F (FOV)
2B0030: AB AA AA 3F --> CD 90 18 40 (Aspect Ratio Menues)
Eyefinity / Surround Specific Solution & Issues
Not really playable but here:
3x16:9
Offset
2A9820: 00 00 40 3F --> 00 00 40 3E (Aspect Ratio)
2A9820: CD CC CC 3E --> 71 3D 4A 3F (FOV)
2B0030: AB AA AA 3F --> AB AA AA 40 (Aspect Ratio Menues)
4k UHD Specific Solution & Issues
Same Solution as in Widescreen.