Low-key should have just been in the full game? Retreads the same stealth (unfortunately, in a slow and repetitive way) as the regular game but that final infected/human combat section was great. I wish there was more of that in the base game. And of course, the flashbacks were beautifully done, more so in the context of the present-day Joel situation. I'd love to do a "machete-order" of this with the base game if I ever get around to another playthrough.