TL;DR
- Complete three distinct mystery puzzles across Rome’s underground and historic locations
- Earn essential Mithraic Artifacts and the Hard Crust combat adventure book as rewards
- Unlock the Depths of the City achievement required for 100% DLC completion
- Follow systematic clue discovery and decoding processes for each puzzle type
- Use environmental observation and historical context to solve complex riddles
Conquer every hidden challenge in the Indiana Jones Order of Giants expansion with our comprehensive puzzle-solving guide. Discover safe combinations, decode ancient clues, and locate all valuable artifacts efficiently.
The Order of Giants DLC introduces three intricate mystery adventures to Indiana Jones and the Great Circle, each delivering engaging puzzle mechanics and significant gameplay rewards. You’ll explore forgotten chambers, interpret religious symbolism, and reconstruct historical narratives while pursuing rare Mithraic Artifacts and specialized skill books. These investigative quests represent crucial gameplay elements rather than optional content, as they’re mandatory for achieving the Depths of the City accomplishment and accessing the DLC’s premium loot.
The expansion contains precisely three mystery challenges distributed throughout Rome’s subterranean networks and architectural landmarks. Each investigation provides distinct rewards:
You need to successfully complete all three investigative missions to unlock the Depths of the City achievement, which is necessary for achieving full DLC completion status.

Your initial investigative mission commences immediately at the DLC’s starting position. Proceed to the upper level of Casina Pio IV and access the deliberation chamber on the eastern side. You’ll immediately notice a secured container, but anticipate requiring proper preparatory steps before attempting access.
Advance toward the western workstation within this space and engage with the correspondence resting there. This manuscript formally initiates the Collegial Investigation and offers your primary hint regarding the secure container’s contents.
The crucial revelation emerges from a secondary document concealed under one of the deliberation enclosures on the chamber’s western flank. This note includes three obscure theological allusions that demand interpretation.


Pro Tip: Always examine documents from multiple angles as some contain hidden text visible only from specific viewpoints. The religious references typically correspond to numerical values based on biblical chronology or saint attributes.
Avoid This Mistake: Don’t waste time trying to brute-force the safe combination. The solution requires contextual understanding of the religious symbolism rather than random number testing.
The viticulture narrative investigation transports you deep beneath Rome’s streets into extensive sewer networks where ancient winemaking practices intersect with mysterious artifacts. This environmental puzzle demands careful observation of hydraulic mechanisms and symbolic representations.
Begin by locating the primary access point near the abandoned fermentation chambers, identifiable by distinctive stone archways and residual vineyard iconography. The puzzle mechanism incorporates multiple water flow controls that must be activated in precise sequence to reveal the artifact chamber.


Advanced Strategy: Map the water flow patterns before activating any controls. The correct sequence typically follows the natural wine production process: crushing, fermentation, and aging.
Time Investment: Allocate approximately 15-20 minutes for this puzzle, including exploration and trial periods. The solution becomes more intuitive once you recognize the production workflow symbolism.
The celestial bovine mystery represents the most astronomically complex challenge in the DLC, requiring interpretation of stellar alignments and mythological representations. You’ll encounter elaborate murals depicting ancient constellations and zodiac symbolism that conceal the artifact’s location.
This puzzle demands cross-referencing multiple celestial maps scattered throughout the excavation site. The solution involves aligning celestial bodies according to specific seasonal patterns represented in the artwork.


Mechanics Insight: The puzzle uses a sophisticated day/night cycle mechanic where certain constellations only become visible during specific time periods. Adjust your in-game clock to access different celestial configurations.
Common Pitfall: Players often misinterpret the Taurus constellation references. Remember that ancient Roman celestial maps often inverted modern constellation orientations, requiring mental rotation of the star patterns.
Successfully completing all three mysteries not only grants their individual rewards but also triggers the Depths of the City achievement, marking your mastery of the DLC’s investigative content and contributing significantly to your overall game completion percentage.
Action Checklist
- Begin Collegial Mystery at Casina Pio IV upper floor debate room
- Solve religious reference clues for safe combination
- Navigate sewer systems for Tale of Wine Making puzzle
- Decode celestial patterns for Bull in the Sky mystery
- Collect all artifacts and verify achievement unlock
No reproduction without permission:Tsp Game Club » Indiana Jones and the Great Circle Guide: Order of Giants DLC Guide Master all three Indiana Jones DLC mysteries with expert puzzle solutions and achievement strategies
