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Probably MHRD[0]

I'm a hardware engineer, and enjoyed playing this in my spare time. You create small components from nand gates with an extremely simple made-up HDL and gradually integrate them together into larger and larger functional blocks until you have a basic but working CPU.

[0]https://store.steampowered.com/app/576030/MHRD/

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I had to dig through my library, because even among programming games I own there were many options, but the one I was thinking of was https://store.steampowered.com/app/684270/Silicon_Zeroes/

Definitely on the "Basic" side of hardware programming, but it helped me personally fill in some gaps in my understanding.

Is MHCD "game fun logic", or will I understand some meaningful concepts via play? I'm not looking to get into CPU design in the real world, but a teachable moment crossed with "how things work in abstract" is interesting.

I can recommend The Elements of Computing Systems and the accompanying website https://www.nand2tetris.org/

Not a game but a pretty good read/work through.

Thanks.

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