I "just" created a real-time strategy game before christmas because I could have Claude writing all the code and test it itself. It wrote the spec too, by me telling it to plan out a game "a bit like X but with A, B, C features instead".

It works. It's playable. I might put it online some-time when I get a chance.

[EDIT: My involvement apart from the code-skimming mentioned below was mostly play-testing after Claude had "play-tested", and giving it feedback on what to add or change]

My best estimate from having written much simpler games before was that it churned out many months worth of working code in days. I've not written a line of it - just skimmed some code and told it to make a few architectural refactors.

It's absolutely crazy.