Eastward Bound + Who the Hell is Leviticus Cornwall? - Gold Medal Run
There are two more gold medal missions. The journey to the east is simple: skip the cutscenes and quickly move forward, remembering to pick up Javier.
But the other mission was a bit more challenging. The key is to pay attention to the shootout after the train stops, as in my other attempts, the checkpoint restart sometimes failed (the gold medal requirements were violated).