I only have two Avalon Hill games left—Flat Top and Wooden Ships & Iron Men. I always hoped for good computer adaptations, especially for Flat Top, which had a lot of paperwork.
For free PC games, Matrix Games offers Pacific War and War in Russia. They were designed in the DOS era but still worked on Windows 11 last time I played.
I used to enjoy SSG’s Reach for The Stars in the 80s. MicroProse made great strategy games back in the C64 and PC days.
Now I play older Paradox titles like Crusader Kings 2 and Europa Universalis 3, along with Matrix Games’ War in the East and War in the West. I will check out the SGS games.
I still play C64 and Amiga games on emulators, especially SSI titles and an Amiga version of the Battlemech board game. Turn-based on a hex map is still the best.