If you must play the standalone base game, your options are limited to managing the stretching:
When you launch HOMM5 on a modern monitor (1920x1080, 2560x1440, or 4K), you are usually greeted by stretched UI, tiny menus, or massive black vertical bars on the sides of your screen. The game was hardcoded for 4:3 and 5:4 aspect ratios. heroes 5 widescreen fix best
natively supports 16:9 and 16:10 resolutions like 1920x1080 without stretching the UI or game world Porting Content : If you want to play the original campaigns or Hammers of Fate If you must play the standalone base game,
Some games allow you to create a custom resolution through their configuration files or through utilities like (for NVIDIA) or ATI Tray Tools (for AMD). You might need to tweak the game's config files directly or use third-party tools to set a custom resolution. You might need to tweak the game's config
Use tools like RivaTuner to create a custom resolution that matches your monitor's native height but maintains a 4:3 ratio.