The game Oxyd for the Atari ST was completely written in ~Oberon~ (no, it was Modula-2). Such an addictive game.

https://www.youtube.com/watch?v=tm6ZgMKBL38

I thought it was written in Modula-2. The Megamax compiler was quite popular. Oxyd is great but for some reason I prefer the monochrome display.

Oh, "you are absolutely right". It was written in Modula-2. I got it mixed up.

But related languages anyway. :-)

Edit: Yes, I prefer the monochrome display and version too! Still using my monochrome SM124 monitor with Steinberg Cubase 3.1. It is a work horse. Only my eyes getting worse. Not the screen!! :-D

It was written in Megamax Modula-2 by Application Systems Heidelberg, a small German software company as far as I recall.