The Monster's Gate Puzzle is the final major puzzle in The Order of Giants DLC. How to Solve The Monster's Gate PuzzleAfter dropping down to the lower level of the Mithraeum, be ready for a fight. Snap a picture of The Monster’s Gate and pick up the Notes on Mural. Place it in the pillar in front of The Monster’s Gate to unlock four more pillars. The Monsters Gate Puzzle CompleteThe Monster's Gate Solution