its AR game like Ingress
https://play.google.com/store/apps/details?id=com.Lindenvalley.WorldopolyMiner
it turns out that MMO wont fitted out if tried to collaborate with Crypto.I have seen some games too having the same concept no need to
name it though.
If not, people can buy dozens of cheap phone to bot this game, or even run multiple VM on a PC to bot.
There are "phone farms" clicking ads btw: http://www.mirror.co.uk/news/world-news/bizarre-click-farm-10000-phones-10419403
If it's not bot proof, it's back to mining but instead of solving hashes, it's running mmorpg farm bots.
but having a detection or security would always be needed.