Add cutscenes to the game to make it more interesting. Example if you enter the fort constitution you can see the zombies there preparing to fight. Another example at the Castle, the werewolves and the vampires could have animations too! But a must have cutscene is the 80km cutscene to bright up the environment. You could add these to every POI's which would be cool. Also if you add this feature, don't forget to add a skip button.