A completed and marked map of the second optional dungeon, the Underground Maze. Shows the locations of everything instead to easily reach the boss and find all of the chests for the “Tunnel Vision” achievement.
Underground Maze Map
Starting point is on the left, next to the bottom of the sideways screenwraps. Middle wrap is blocked by a cave-in, forcing you to go to one of the other ones. Cave-ins blocking the pathways are marked by boulders. (Go around them) Puzzle rooms are not required for the “Tunnel Vision” achievement. The boss is in its own room down a ladder.
Click to enlarge.
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