That "Capture the Flag" has a very specific aesthetic and looks very NeoPaint-y. I'm sure I saw a few games use that style. Was it a specific GUI toolkit?
While I'm rambling, I want to throw Conquest (1992) into the mix as it's where I got the bug for Risk and it, too, was very customizable like Scorched Earth: https://archive.org/details/msdos_Conquest_1992