I play that game as well. There is nothing in the game that should bother your parents (like sexual themes, or extreme violence). If you don’t want your parents to know, that’s fine, the game’s not dangerous. You have a right to privacy, and your parents should respect that, so if they ask, say that it’s just a game, or come up with a little white lie. If you are worried about them catching you, stay in your room while you play.
Enjoy the game!