We're getting this one out of the way early. While the original game shows its age in a lot of ways, it's also timeless in its position in history. A game like this just didn't exist before Kingdom Hearts. It's high concept, anime fantasy mixed with that distinct brand of weird, janky Square action game. Then, it ballooned into an enormous mythology that continues to grow in transmedia complexity to this day. While getting into the series is nice and intimidating no matter where you start, there's no denying the impact Kingdom Hearts has had, and continues to have, since its PlayStation 2 debut.