That's a shortcut, you're able to add a shortcut to any game meaning you add a non-steam game to your steam library. It won't count towards the amount of games you have and it'll say that you're in a non-steam game when you load it which in this case is minecraft if i recall correctly there was a main screen splash text saying "Not on Steam" haven't played for 3 years so i can't remember and i don't intend to come back Someone must have added it to your library while you were doing something else if you don't remember doing it yourself And 47 steam credit? jesus christ get me an ak-47 vulcan or an m4a4 asiimov (jk)