Shadow of the Colossus was the same way. Just you and your horse. An open world to find the way through the puzzle and fight the enemy. The art design is so different. Also the emotional connection it builds between the characters is like nothing I've experienced to this day in a video game. By the end of the game that horse felt like a real friend to me. It had to be used to win so many of the fights. At the end of the game the horse falls a couple hundred feet while saving you and I honestly felt like I had been gut punched.