Baseline (Widescreen) Solution & Issues
From the menu the game supports only 4:3 resolution up to 1600x1200. To get widescreen you have to open game folder, then open folder data and search file VideoSettings.scr. Open it for example with notepad++, search line resolution and change your resolution for example 2560x1440. Save and close file.
Jackfuste made a FIX for Chrome Specforce and luckily since its the same Engine it works with The Hell in Vietnam. Fix available from the PC Gaming Wiki Community Files (search there)
Additional information:
The game was designed for Windows XP and on Windows Vista, 7, 8, 8.1, 10 the game can be crash to the desktop after the second mission.
To make the game work on Windows 7 64 Bit I had to install the game on an old PC with Windows XP
and copy to the game, save files from Windows 7 64 Bit and complete the second mission on Windows XP. Then I copied the game save files to the game folder on Windows 7 64 Bit and I could continue the game.
Ultra/Super-Wide (21:9/32:9) Specific Solution & Issues
Eyefinity / Surround Specific Solution & Issues
4k UHD Specific Solution & Issues
To get 4K Ultra HD you have to open game folder, then open folder data and search file VideoSettings.scr. Open it for expample with notepad++, search line resolution and change to 3840x2160. Save and close file.
Jackfuste made a FIX for Chrome Specforce and luckily since its the same Engine it works with The Hell in Vietnam.
Aspect Ratio Fix: Download and extract jackfustes FIX ChromeEngine2_v4.7z from attachment to the game folder.
Additional information:
I have to remove from the game folder logo.mpeg and logo_chrome.mpeg because on 4K the game crashes to windows. Without these files the game works fine in 4k Uktra HD.