David (or your name) is an ordinary guy with a hard past and not much better present. He never saw his mother because she died in his childbirth. His father was constantly busy with his business, so various nannies with whom he could never find a common language were engaged in the upbringing of the protagonist.
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