I'm up to chapter 22 of the SP and I haven't touched multiplayer yet, but I must say.
WOW.
This game is excellent. The majority of the criticisms I had about the original have been fixed. There's definitely more variety and the gun play is much much tighter this time around.
and the graphics. This is easily the best looking console game of all time, sadly I only changed the settings from 720p to 1080p from about chapter 15 onwards (I noticed a difference, it isn't massive but it makes everything look less artificial). There's been a few hiccups (notably a leg wobbling around with a shoe on it on the shelf of a shoe case in nepal... i'm not sure it was intentional, but the placement of it is hilarious... it's on the bloody shoe shelf!)
Seriously, when you explore Tenzin's town and you spin the camera around. Absolutely brilliant. Speaking of the camera, it is brilliant, almost perfect. There's not many times that I need to move the camera around that wasn't for me to marvel at the surroundings and it does a good job of showing you what you need to focus on next.
And the characters. I used to think nathan drake was a very average video game character and quite boring, but 3 hours into this game and I was convinced he is a classic (the first hour was pretty much the same old boring what you'd expect drake, but after that, things change for the better).
I'm fairly certain it was the back and forth banter between Nate and the other characters that changed my opinion. I actually care what happens to these people this time around.
I have only one gripe about this game, the platforming/adventuring aspects. This part really annoys me because so much of the game requires you to jump from tight spot to another, yet the controls don't allow you the freedom to do it "your own way". I'm not talking about Assassin's creed "climb anything you can grasp onto" controls, but don't punish me for wanting to jump 2 platforms thinking that I could grab onto a ledge and then killing me, forcing me to jump 1 platform at a time to eventually land on the ledge it didn't let me previously.
The platforming is really really average. It looks good when you follow the exact path the game wants you to take, but I want a little freedom. And the game does a good job of making it seem like it didn't nudge you down that path. Prince of persia suffered a bit of this as well, but no where near as frequently or as frustratingly.
Also the AI is fairly spotty. Though it may seem unfair that I don't punish this game for having really average AI (especially in the stealthy segments) and having next to nothing original about it (lets be honest), the rest of the game (including gun play) are so brilliant that it makes up for it.
This is another PS3 title that has a soul/spirit about it, which is surprising given the lack of originality, but it does some things so well (like character development and depth) that frankly, I don't give a damn. A must buy for every PS3 owner.
Right now it's a 9.5 for me (damn platforming segments), but we're talking everything except platforming segments it could easily be a 9.7 or 9.8