Lordmancer II is a mobile multiplayer free-to-play online RPG that allows players to mine
cryptocurrency and spend it both inside and outside of the game. The game is already in open beta testing on Android.
You may know the game from back in 2008 when Lordmancer I was launched. It was one of the first online RPG games made for Java feature phones! It was (and still is!!!) a free-to-play game with the same main mechanics: real-time PvP, expandable game world, open market, clan wars. It was a tremendous challenge to put so much into rather primitive devices.
You can download the game here.