During the final mission just as I'm about to walk into the cutscene with the chairman the game crashes I've tryed multiple times and it keeps happening, I believe there could be verious reasons for this 

1.i was disguised at the time and when I killed everyone in the area I could then proceed with the Misson although I missed out in the cutscene. 

2. At the end sene were you told what happened to the world pavarti was dead however I don't know why as I was playing normal difficulty and your companions can't die.?. 

Having the same problem, I'm getting a CTD when entering the room.

Yeah that's it exactly you can just shoot the guards and hell come running out but I'm not really happy with that