It was probably some educational game like Math Blaster. I don't remember. Or maybe that Space Cadet Pinball thing.
The first non-educational video game I remember playing was a space shooter called Fury^3 (as in "Fury to the power of three").
There are several events in some Hearts of Iron 4 mods which end with someone being executed that also decrease your manpower by 1. It's insignificant (an average infantry division will require 10,000 manpower) but it's a nice touch.