I don't kow why but apparently Naughty Dog felt the need to create another Jak game. Why it got the roman number for 10 (or maybe it's just an actual X), I don't know. This was more of a race game than an actual continuation of the story from the previous games. There's mostly concept art from the racers. Probably the most interesting piece of this collection is the comparison sheet of Jax where all four of his iterations or put next to each other.