Luigi's Mansion 2 HD

Treacherous Mansion Gems and Missions Guide

Treacherous Mansion is the fifth mansion in Luigi's Mansion 2 HD (Dark Moon). See a map of Treacherous Mansion, a list of missions, Secret Door levels, as well as the locations of all collectible Boos and Gems found in this mansion!

Previous Mansion Current Mansion Next Mansion
Secret Mine Treacherous Mansion King Boo's Illusion
E-1 E-2 E-3 E-4 E-5 E-Boss E-Bonus

Treacherous Mansion Map

★ Press the icons on the right side to show collectibles and points of interest on the map.
★ Toggle the Full On icon to expand the map.


The Interactive Map both shows the location of key points on the map, and doubles as a collectible checker.

  1. Click an icon on the right side to show all the pins of a specific type, or click the magnifying glass button to search for a specific pin by name.
  2. Click a pin on the map to see its name and description, and a relevant picture or video if available.
  3. From here, click Mark as Acquired to indicate that you've gotten a collectible already. This will change its icon on the map to show that it has been collected, and add 1 to that pin type's Counter.
  4. To undo this, click on the same pin and click Restore to unclaimed.
  5. To check how many pins you have marked so far, check the Counter in the bottom left, and click the icon that looks like a checklist to see counters for all pin types.
  6. If the collected pins start to get in the way, you can hide them all by clicking the green Show Pins button on the left side.
Icon How to Use
Name Button.png Show Names
This button reveals the Name of every icon currently shown.
Show Pins Button.png Show Pins
This button will toggle between showing and hiding all the pins which you have already marked as acquired.
Full Button.png Fullscreen
This button will change the map display to fill the screen.
Search Button.png Search Mode Toggle
This button will display a searchbar which you can use to search for an individual pin by its name.
Icon Mode Button.png Icon Mode Toggle
In Search Mode, this button will toggle you back to Icon Mode, removing the search bar and displaying the icons again.
All Pins Button.png All Pins
This button is shown along with the Icons on the right when there are over 6 types of pins. Click it for a full selection of all available pin types.
Interactive Map Counter.png Counter
Tracks the number of pins you have of a certain type. The pin type shown is set to the page and currently cannot be changed; however, all pin type counters can be viewed by clicking the checklist icon on the right side.
Interactive Map View All Counters.png View All Counters
This icon is found on the right side of the Counter. When a map has more than one pin type, click this icon to see Counters for all pin types.
Diablo 4 - Zoom In Zoom Out Icons.png Zoom In / Zoom Out
This icon is found on the top left side of the map. You can press these buttons, or use your scroll wheel while hovering, to Zoom In and Out of the interactive map.

All Collectibles
Boo Locations Gem Locations

Treacherous Mansion Gems

✔️ Gem Image Mission Also Found In How to Find
LuigiCircle Diamond E-1 Front-Door Key E-1, Bonus Room: Underground Lab
Head into the Underground Lab, defeat all the enemies and the Boo, use the iron helmet to shoot the glass bottle up on the wall on the east, and grab the Circle Diamond as it drops down.
LuigiTriangle Diamond E-1 Front-Door Key E-1, Bonus Room: Haunted Catacombs
Head into the Haunted Catacombs past the Underground Lab, head towards the very northeast corner, and use the Dark-Light Device on the painting on the wall to grab a flaming web ball. Then head towards the west until you find a web and burn it down to obtain the Triangle Diamond hidden behind.
LuigiRectangle Diamond E-1 Front-Door Key E-1, Bonus Room: Cliffside
Head towards Cliffside through the door on the southeast corner in Haunted Catacombs. Then use the Poltergust to suck the Rectangle Diamong hanging on a vine.
LuigiFootball Diamond E-2 Double Trouble E-2 to E-3, E-5, Bonus Room: Front Entrance
At the Front Entrance, use the Dark-Light Device to reveal the statue on the right side at the bottom of the stairs, and then pull the chain to reveal the secret vault. Once you open the vault and defeat all the enemies, you can obtain the Football Diamond inside.
LuigiDrop Diamond E-2 Double Trouble E-2 to E-3, E-5, Bonus Room: Restrooms
In Grand East, use the Dark-Light Device to reveal a hidden door in the west area. The door will lead you to Restrooms, and once you pull the chain to flush the toilet, it will burst out the Drop Diamond.
LuigiStone Diamond E-2 Double Trouble E-2, Bonus Room: Gargoyle Roof
On the Gargoyle Roof, suck up shooting stars from the sky and the gargoyles to complete the star constellation in the sky. Once the star constellation is completed, it will drop the Stone Diamond on the roof.
LuigiRhombus Diamond E-2 Double Trouble E-2 to E-3, E-5, Bonus Room: Anceint Exhibit
Once you've got a bucket of water from Jungle Exhibit, head towards the Ancient Exhibit. In the Ancient Exhibit, bring the bucket of water on the upper floor through the cave in the east, and then water the flower. Then use the Strobulb on the flower to make it drop the Rhombus Diamond.
LuigiStar Diamond E-3 A Train to Catch E-3, E-5, Bonus Room: Aviation Exhibit
Head into the Aviation Room, pull down the heavy bags tied to the hot air balloon, defeat all the enemies, and the Star Diamond will drop from the hot air balloon.
LuigiOctagon Diamond E-3 A Train to Catch E-3, E-5, Bonus Room: Nautical Exhibit
Once you've got a bucket of water from Jungle Exhibit, head towards the Nautical Exhibit. In the Nautical Exhibit, place the bucket of water opposite the steering wheel on the upper right to reveal a hidden room. In the hidden room, open the chest on the end of the ship to obtain the Octagon Diamond.
LuigiOval Diamond E-3 A Train to Catch E-3, E-5, Bonus Room: Dark Age Exhibit
Using your Poltergust, suck up a bulb from Study to float on the upper right platform in Front Entrance and get the book in the gargoyle's mouth. Suck the book into the Dark Age Exhibit and place it on the bookshelf in the middle, and then the Oval Diamond will be revealed.
LuigiSpindle Diamond E-3 A Train to Catch E-3 Room: Jungle Exhibit
Using your Poltergust, suck up a bulb from Study and bring it into the Jungle Exhibit. In the Jungle Exhibit, use the bulb to float on the upper left platform and then suck the golden bulb. After collecting all the coins by using the golden bulb, head to the upper right platform to open the chest and obtain the Spindle Diamond.
LuigiCoffin Diamond E-3 A Train to Catch E-3 Room: Ice Age Exhibit
Using your Poltergust, suck up a bulb from Study and bring it into the Ice Age Exhibit. In the Ice Age Exhibit, use the bulb to float on the upper left platform and then suck the golden bulb. After collecting all the coins by using the golden bulb, head back to the upper left platform to open the chest and obtain the Coffin Diamond.
LuigiMushroom Diamond E-3 A Train to Catch E-3, E-5, Bonus Room: Train Exhibit
Head into the Train Exhibit, defeat all the enemies, use the Dark-Light Device to reveal a hidden rail track in the middle, then ride the train around the room, and once the train stops, you have already obtained the Mushroom Diamond.

Gem Locations: How to Find All Gems

Treacherous Mansion Boos

✔️ Mission Boo Name HP How to Find
E-1 Front-Door Key Booll 40 Room: Underground Lab
Enter the underground lab, defeat all the enemies inside, turn the valve on the north wall to shock the armor on the table, and the Boo will appear.
E-2 Double Trouble Boopa Troopa 35 Room: Inner Courtyard
Enter the inner courtyard, shoot the toads in the cages of the statue in the middle of the area, and a Boo will appear.
E-3 A Train to Catch Booreaucrat 40 Room: Dark Age Exhibit
Get a bulb from the study portal in the upper right of the front entrance, use the bulb to float on the upper floor of the dark age exhibit, use the golden bulb on the upper right platform, collect the coins, and open the chest afterwards, and a Boo will appear.
E-4 Ambush Maneuver Big Boo Room: Train Exhibit
Enter the train exhibit and use the Dark-Light Device on the north side, where the train engine originally was. Suck up all the spirit balls to reveal the Boo.
E-5 Paranormal Chaos MaraBoo 40 Room: Aviation Exhibit
Enter the aviation exhibit and use the Dark-Light Device in the middle of the room, where the hot air balloon originally was. Suck up all the spirit balls to reveal the Boo.

All Boo Locations: Where to Find All Boos

Treacherous Mansion Secret Door Bonus Levels

Mission Location How to Beat Rewards
E-1 Front-Door Key
Haunted Catacombs

Collect all the red coins within the time limit.
Treasure
E-2 Double Trouble
Kitchen

Collect all the red coins within the time limit.
Treasure

All Secret Door Locations and Rewards

Treacherous Mansion Missions

Treacherous Mansion Missions
E-1 E-2 E-3
E-4 E-5 Boss
Bonus Mission

E-1 Front-Door Key

E-1 Front-Door Key
Goal Use the Front-Door Key to open the Front Entrance of the Treacherous Mansion. Once inside, start looking for the Dark Moon piece. Follow the Polterpup, and recover the Front-Door Key.
Boo Location Underground Lab
Obtainable Gems ・Circle Diamond
・Triangle Diamond
・Rectangle Diamond

E-1 Front-Door Key Walkthrough

E-2 Double Trouble

E-2 Double Trouble
Goal Search the main floor of the Treacherous Mansion for the Toad assistant, and bring him back to the Bunker. It turns out E. Gadd assigned two Toad assistants to take care of the exhibits. Find the other Toad, and send both Toads back to the Bunker.
Boo Location Inner Courtyard
Obtainable Gems ・Football Diamond
・Drop Diamond
・Stone Diamond
・Rhombus Diamond

E-2 Double Trouble Walkthrough

E-3 A Train to Catch

E-3 A Train to Catch
Goal Use the makeshift rotor to activate the stairwell in the Inner Courtyard. Then rush to the Train Exhibit and rescue Mario.
Boo Location Dark Age Exhibit
Obtainable Gems ・Star Diamond
・Octagon Diamond
・Oval Diamond
・Spindle Diamond
・Coffin Diamond
・Mushroom Diamond

E-3 A Train to Catch Walkthrough

E-4 Ambush Maneuver

E-4 Ambush Maneuver
Goal King Boo seems to be up to something inside the Train Exhibit. Ambush him while he's distracted. The miniature model in the Train Exhibit was a trick! Don't let Big Boo get the best of you.
Boo Location Train Exhibit

E-4 Ambush Maneuver Walkthrough

E-5 Paranormal Chaos

E-5 Paranormal Chaos
Goal Reach the Terrace, and discover the source of the strong paranormal signal. King Boo has sent a horde of ghosts to start a paranormal riot. Capture all of the ghosts before they become too powerful to be stopped!
Boo Location Aviation Exhibit

E-5 Paranormal Chaos Walkthrough

Stop the Knightmare

Stop the Knightmare
Goal The portal has brought you to an unknown location! Look for the possessor ghost and the final piece of the Dark Moon.

Stop the Knightmare Walkthrough

Terrifying Invasion

Terrifying Invasion
Goal Ghosts are invading the Treacherous Mansion! Go to the outbreak points and capture all the ghosts at each location in order to prevent a paranormal catastrophe.

Terrifying Invasion Walkthrough

Luigi's Mansion 2 HD Related Guides

Luigi

All Mansions and Stages

All Mission Guides

Gloomy Manor
A-1 A-2 A-3
A-4 A-5 Boss
Bonus Mission
Haunted Towers
B-1 B-2 B-3
B-4 B-5 Boss
Bonus Mission
Old Clockworks
C-1 C-2 C-3
C-4 C-5 Boss
Bonus Mission
Secret Mine
D-1 D-2 D-3
Boss Bonus
Treacherous Mansion
E-1 E-2 E-3
E-4 E-5 Boss
Bonus Mission
King Boo's Illusion
A Nightmare to Remember

Post-Game

Post-Game Guide
ScareScraper Guide Ending and Post-Game Content 100% Checklist

ScareScraper Records Board

Author

    Walkthrough Menu

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