MoonCryptoPolis is a game based on the Ethereum blockchain. You can buy land plots on the moon and farm different ressources (Metals, Water, Helium etc.) from them. You can also buy whole sectors with dozens of land plots and sell those to other players.
Well, it's easy!
First of all you need to buy a land plot or a sector.
Then you will receive ETH if people buy plots in a 5x5 area around your plot. Also there are daily missions, for example you have to farm 3 tons of Gold. For that you also will receive rewards!