A big improvement from the first one.
I honestly don't know what they are called however, I would be lying if I didn't say I was a little bit scared when you got into encounters with these creatures. I definitely liked these creatures compared to the ones in the first one. The final boss was actually quite good, again a lot better compared to the first one, the ending was also really really good.
Overall this was just a really good game, the controls were good like the first one and the music and graphics were also just as good as the first one, everything just was great for me, the progression from one clue to the next wasn't overbearing, and most of the puzzles from these were easy and not cryptic, some gamers might want more of them considering most of the game revolves around it, but I would have to disagree the puzzles are okay but sometimes they just become too tedious, and Uncharted 2 did not let that happen so I really appreciate that on this game. As usual the voice acting was superb and the new characters were no exception they were voiced very well also, at first I wasn't a huge fan of Chloe Frazer but as the story went on I really did enjoy her as a character. Also Lazarevic was a really believable boss, he was truly evil and they did an outstanding job developing his character, you could really tell that this guy was an insane mad man and sure the boss fight with him was not the best one I have ever played however I feel they truly tried their best to make something at of it so it was pretty good. If you like The Uncharted series you must get this game, seriously they outdid themselves on this one.