Trying to remember a specific game piracy story

It was from a couple of years ago. A fairly small indie dev figured out their game had been pirated to hell and back because the number of achievements earned vastly outstripped the number of copies sold.

I know piracy on this level happens all the time, but I'm trying to remember this specific one. Any ideas?

I only remember things like much more players playing online than copies sold. It was the case for Unreal Tournament 3 and Demigod.

Is it Punch Club? Found this article.

I don't think those are the specific instances I was thinking of, but they are pretty interesting. Thanks for sharing.

This one about Game Dev Tycoon is pretty good as well.