Baseline (Widescreen) Solution & Issues
New Solution: Download MGS2 V's Fix wich includes a Widescreen Patch for 16:10 and 16:9 aspect Ratio and a lot of other usefull things.
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Same Solution as in Widescreen -> MGS2 V's Fix but you need to HEX edit the Aspect Ratio for 21:9.
Open mgs2_sse.exe in a HEX editor:
Go to OFFSET 4A9EF0 look for 00 00 80 3F and change it to 00 00 10 3F and save it.
Now run the Game through tMGS2SSetup.exe (MGS2 V's Fix) and change your Resolution: 3400 x 1440 + Mantain Aspect Ratio: ON and Full Screen Cutscenne: ON
Eyefinity / Surround Specific Solution & Issues
Same Solution as in Widescreen -> MGS2 V's Fix but you need to HEX edit the Aspect Ratio for 3x16:9.
Open mgs2_sse.exe in a HEX editor:
Go to OFFSET 4A9EF0 look for 00 00 80 3F and change it to 00 00 80 3E and save it.
Now run the Game through tMGS2SSetup.exe (MGS2 V's Fix) and change your Resolution: 5760 x 1080 + Mantain Aspect Ratio: ON and Full Screen Cutscenne: ON
4k UHD Specific Solution & Issues
Same Solution as in Widescreen