Based in the gritty Fallout universe. You play as a retired NCR veteran that settled in the Boston Commonwealth and run a bar in Diamond City. As you try to forget your incredibly harsh past you do your best to try to protect those close to you. Oh yeah, you can also "sex" them up.
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