What are the best exploration based games on PS4?

The combat in NieR: Automata is incredible. It has a very hack-and-slash feel to it, with an emphasis on agility and acrobatics. You will have to switch from using small, quick jabs with your weapon, to devastatingly strong attacks. You also have to utilize ranged attacks, as well as the companion that follows you around if you want to have any hope of surviving every encounter. It can be very difficult to win battles sometimes, but it also feels equally rewarding when you finally achieve victory.