The concept of having cryptocurrency-driven games, or rather, games which utilized specific cryptocurrency tokens was one of many concepts I had in per-development back in 2014.
But it never went farther than having a number of IRC chats with a few other developers, coders, a cryptographer, and some rough loosely written white papers I drafted.
The concept was ArcadeCoin, which I hold the twitter @ArcadeCoin handle to... as well as the Bitcointalk account username ArcadeCoin, which was used by the few of us who worked a bit on the project.
However it's been dormant for a long time.
If I remember correctly it would have been Cryptonight based, but we honestly moved on to other projects simply because of the game development in conjunction with the cryptocurrency integration (specifically related to the blockchain timing/confirmation issues) was simply too much of an undertaking (at that time).
I have always thought it was a solid concept in theory; however I am not a "game" developer, and game developers we found lacked the understanding of blockchain integration... basically we spoke different languages.
I made the decision in December to pick back up where I left off with a different project- HALO, which will be a blockchain based dynamic cryptocurrency-- I'll leave the details to that until we release / update the ANN thread / Twitter, Handles for that name...
But ArcadeCoin or some variation / concept based on that idea still intrigues me.
Cheers!
Strato