Not OP, but Dark Souls 1 is probably the purest Souls experience: Slower and punishes impatience like no other. Depending on how much time you wanna spend reading item descriptions, you‘ll probably need to google things for a few gimmick areas/bosses. I like it more than 3 since it‘s not as influenced by Bloodborne yet thematically and in gameplay; it‘s closer to Demon Souls. It also has the most vertical world, which is such a unique experience. A must play for any Soulsborne fan.