If this idea was implemented it would be one of the pionner on joining crypto with gaming. And that has to happen someday. There are few games trying (forget faucets), like Spell of Genesis (still on beta, but market up and running, http://www.spellsofgenesis.com/), or Beyond the Void (still in dev, http://beyond-the-void.net/ ).
Cryptocurrencies in videogames are just around the corner xD