Blog author here, in 2020 I released a DOS game built completely in my own Forth system. Fully open source and hackable. https://spindleyq.itch.io/neut-tower
The coolest application of the Forth philosophy in that project was actually building tools that integrate directly with the engine, imo. I built a map and tile editor directly into the game for quickly iterating on art and level design, and at one point even added a slide presentation engine for giving talks with that had live demos integrated directly into slides. The eureka moment was when I added map editing and realized that I didn't need to write a fancy GUI just for saving and loading maps, because I had a live Forth console running over the serial port. As soon as I'd written the save/load routines they were immediately, directly usable.
Death Road to Canada is another game I'm aware of that is written in Forth, for more modern platforms.
The coolest application of the Forth philosophy in that project was actually building tools that integrate directly with the engine, imo. I built a map and tile editor directly into the game for quickly iterating on art and level design, and at one point even added a slide presentation engine for giving talks with that had live demos integrated directly into slides. The eureka moment was when I added map editing and realized that I didn't need to write a fancy GUI just for saving and loading maps, because I had a live Forth console running over the serial port. As soon as I'd written the save/load routines they were immediately, directly usable.
Death Road to Canada is another game I'm aware of that is written in Forth, for more modern platforms.