It's no longer a role-playing game. You can't role-play. That much is objectively clear. I'd say for genre classification it is: Action FPS However, I think Fallout 4 fits better into a new category I'd define as: Offline MMO because of its procedurally generated quests and minecraft emulation. I'd describe it as: On-rails open world shoot-and-loot. I certainly would not be filing this game under RPG as it says on Steam. What would you classify the game as? I expect a lot of people will say "Action FPS" as well.