Puella Magi Madoka Magica Side Story smart phone role-playing game in English in the United States and Canada this summer. It japan version named Magia Record: Puella Magi Madoka Magica Gaiden. They are making an Anime from this mobile game.
There is an official website for this English game. As of now the game should be releasing Summer 2019.
The game Story is as followed
The stage is new city, Kamihama City. Guided by a strange power, magical girls gather in this town and battle with a new power drawn from witches. Iroha Tamaki arrives in this town and joins other magical girls to search for her missing younger sister Ui. Before long, Homura Akemi also arrives in the town. “If I can understand the mystery of this town, maybe I can save Kaname.”