Thrallworks; a multiversal BM Company that works in the aquisition, development and sale of 'thralls', sentient servants who perform a multitude of functions. You are Instructor William Reinhold Keller, recently transferred from the Harvesting Deperatment into K-Class Thrall Development; those thralls well know throughout the multiverse. Here you're to orient your first thrall, L-D19; or as she used to be known, 'Ty Lee'...
In order for you to be able to install this game, you need to enable (allow) installation of applications from unknown sources (Unknown sources) in the phone settings. Usually this item is in the Security section