Fire Emblem Heroes has proved to be a massive hit for Nintendo in terms of revenue. The game has thus far managed to accumulate a massive $400M worldwide. The information was revealed by data analytic firm, Sensor Tower. The site says that revenue is six times greater than Super Mario Run and 9.5 times greater than Animal Crossing: Pocket Camp, which should please Nintendo. The strategic mobile RPG has grossed $20 million per month since launch on average.