I really liked Jacob because he's the one that teaches Lara that she doesn't have to do everything herself like on the first game and that there's people who are actually willing to help and fight at her side.
When I first played this, I thought Jacob was actually Jesus Christ. The story was strikingly similar to the Christian story of how Jesus conquered death.
Dude at the end when Jacob kind of puts his hand on Lara's shoulder and for a second they both come closer to eachother I screamed "KISS HIM YOU IDIOT!"
If you mean the Acropolis tower, there is no way to climb up to the top. But there is a door that you can climb under to get out. If you are at Kitezh and ascending that tower, sometimes the map glitches and you have to reload it or try a backup.
