Continuity mistake: In the last mission of the game, Sam is situated in an area where he has to sneak up on the big boss, and take him down along with his two men. Sam must do this very quietly as to not get seen or a timer will go off for 1 minute, and makes it that much harder to finish. You can hear the other characters making comments every so often, like "I think I hear something, or something down there is moving." And if Sam is not seen, you hear a character say "It's probably just the train." There is no train in this mission, there was one however 4 or 5 missions earlier.