Chapter 9: The water coursing through the tunnels is a muddy brown, but when it exits the tunnel is white.
In Chapters: 13/14, When Captain Mephisto gets shot in the left arm, there is no sign of a wound. No blood or hole in his shirt sleeve.
Near the end of Chapter: 6, beginning of Chapter: 7, you can see a crew member driving the speedboat when Lance (Richard Bailey) jumps to the next boat.