With oodles of Mushroom Kingdom charm and fast-paced gameplay, it’s no surprise Nintendo chose the Dr. Mario series as its next big mobile offering. Like Fire Emblem Heroes and Animal Crossing Pocket Camp before it, Doctor Mario World is a free-to-play game that does its best to get you hooked before introducing its monetized in-game currency and time-locked progression system. While it’s a decidedly fun little puzzler, Dr.