I praised Jedi Knight mainly for its intuitive level design and a sense of scale it conveyed. These games being primarily adventures, the actual levels you go through are the key to creating a memorable and fun experience. Mysteries of the Sith's levels are claustrophobic and confusing. You spend most of your time crawling through maze-like tunnels and clearing out small rooms.

The arsenal is the same, except you can now use one of the weapons as a sniper rifle. I forget which one, because I only used that ability once, when the game forced me to, and then promptly forgot it existed. There is never an incentive to use it. You also get some new force powers, but like the rest of them, they are useless.

Most of the game is more or less fine, and I was ready to give it a 7, but it seems like the levels grow more and more confusing, and the enemies grow cheaper. As I mentioned in my review of the original game, I only got lost in it once. Here, I got lost so many times, I stopped counting. The last two levels were especially egregious. The last level in particular is a huge maze with tons of melee enemies, often lightsaber wielders, and we have already established that the lightsaber combat in this game sucks. But while the original game never forced it on you except for some boss battles, the last two levels in this game make all your ranged weapons unusable.

The final boss battle is another pain in the ass. You have to somehow figure out that Kyle needs to get onto that platform, which he struggles to do because apparently a little ledge is too much of a challenge for him, AND you need to turn off your lightsaber when he does. Just how are you supposed to figure that out??? I had to watch a walkthrough on YouTube.

Anyway, another aspect that I really liked about the original was the FMV cutscenes, which here you don't get. Instead there's pre-rendered in-engine cutscenes. And, while the story in the original wasn't great, the cutscenes added a lot of charm. The story here is not really a single coherent story, but more like just a series of events that happen to Mara Jade and have no real consequence upon anything. Except for the last two missions, where suddenly Kyle Katarn does meth and goes insane, and you have to calm him down by beating the shit out of him and making him step on a platform while he's high and his motor skills are fucked.

Ugh....

Conclusion: I really wish this expansion did not exist. Because it looks like something you should play, but it's really half-assed and doesn't understand what made the original great.