What are the best exploration based games on PS4?

While you go about your life in the game, you'll see little tabs on the side and be updated about the state of the world, even about stuff you aren't involved in, you'll see who is fighting who, who is at war, who won and lost a battle, who won a tournament. You can be attacked by anyone at any moment while traveling throughout the world, having a small, or big army can determine whether or not the enemy sees you as a threat. It feels like a very believable world.