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Eldritch Horror Mountains of Madness Board Game EXPANSION | Mystery Game | Cooperative Board Game for Adults and Family | Ages 14+ | 1-8 Players | Avg. Playtime 2-4 Hrs | Made by Fantasy Flight Games
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Purchase options and add-ons
- EPIC ANTARCTIC JOURNEY: Embark on a perilous expedition inspired by H.P. Lovecraft's novella, tracing the path of a doomed Antarctic adventure, and face inhuman horrors.
- WORLDWIDE REPERCUSSIONS: Unearth mysteries and monsters as you explore the vast City of the Elder Things, with global consequences that threaten human civilization.
- NEW INVESTIGATORS: Eight new investigator roles offer diverse abilities, enhancing your chances to survive the frozen wastelands and unearth the Mountains of Madness.
- EXPANDED GAMEPLAY: Discover additional Assets, Spells, Artifacts, and Conditions to aid or hinder investigators, alongside Adventures and Prelude cards shaping the international struggle against Ancient Ones.
- INCLUDES SIDE BOARD: The expansion includes a detailed side board depicting the enigmatic expanses of Antarctica, adding depth and complexity to your Eldritch Horror experience.
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Product information
Product Dimensions | 11.75 x 11.75 x 2.75 inches |
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Item Weight | 2.86 pounds |
Country of Origin | China |
ASIN | 1616619775 |
Item model number | EH03 |
Manufacturer recommended age | 13 - 15 years |
Best Sellers Rank | #96,277 in Toys & Games (See Top 100 in Toys & Games) #2,875 in Board Games (Toys & Games) |
Customer Reviews |
4.8 out of 5 stars |
Is Discontinued By Manufacturer | No |
Release date | December 16, 2014 |
Language | English |
Manufacturer | Asmodee |
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Eldritch Horror Mountains of Madness Board Game EXPANSION | Mystery Game | Cooperative Board Game for Adults and Family | Ages 14+ | 1-8 Players | Avg. Playtime 2-4 Hrs | Made by Fantasy Flight Games
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Product Description
Explore the haunted vastness of Antarctica in Mountains of Madness, the first side board expansion for Eldritch Horror! Inspired by H.P. Lovecraft's tale of a Miskatonic University expedition ravaged by sinister and inhuman creatures, Mountains of Madness challenges players to confront the terrors that Miskatonic' s doomed expedition unearthed. Antarctica's harsh conditions and primeval horrors are brought to life through the side board and accompanying encounter deck, and while new Gates open and new Monsters surface, eight investigators arrive, ready to join your struggles against the Ancient Ones.
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Customer Reviews |
4.7 out of 5 stars 1,078
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4.8 out of 5 stars 395
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4.8 out of 5 stars 453
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4.8 out of 5 stars 453
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4.6 out of 5 stars 3,928
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4.8 out of 5 stars 1,965
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Price | $62.24$62.24 | $32.99$32.99 | $26.58$26.58 | $36.15$36.15 | $40.45$40.45 | $55.99$55.99 |
Type of Game | Board Game | Board Game | Board Game | Board Game | Card Game | Board Game |
Number of Players | 1-6 Players | 1-6 Players | 1-6 Players | 1-6 Players | 1-4 Players | 1-8 Players |
Average Playtime | 2-3 Hours | 2-3 Hours | 2-3 Hours | 2-3 Hours | 1-2 Hours | 2-4 Hours |
Recommended Player Age | 14 and up | 14 and up | 14 and up | 14 and up | 14 and up | 14 and up |
Game Objectives | Stop occult rituals and destroy alien creatures | Investigate the recent upsurge in violent crime | Confront the ghosts of Arkham’s past | Investigate the horrors that lurk beneath the ocean waves | Unravel arcane mysteries and conspiracies | Travel the globe to save the world from a diabolical, omnipotent Ancient One |
Game Setting | Arkham City | Arkham City | French Hill Neighborhood | Kingsport and Innsmouth | Arkham City | All around the world in the year 1926 |
Horror Game | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
Mystery Game | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
Cooperative Game | ✓ | ✓ | ✓ | ✓ | ✓ | ✓ |
Expansion Option | ✓ | is an expansion | is an expansion | is a large box expansion | ✓ | ✓ |
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Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers enjoy the expansion for its variety and content. They find it a fun and engaging addition to an already amazing game. It adds new cards, new characters, tokens, and a new side board. Many consider it a good value and a needed addition to the base game. The quality, speed, and board are also appreciated.
AI-generated from the text of customer reviews
Customers enjoy the expansion. They find it fun and adds variety to the game with new cards, challenges, and encounters. The extra board and challenges are appreciated, but some feel weird having more locations. Overall, the expansion extends the playability and makes great adjustments.
"...It adds some great components, and includes a fun addition to the game without making it too cumbersome...." Read more
"This is the second expansion of Eldritch Horror and is a 'big box' expansion...." Read more
"...Each expansion shows up to give your games a unique flavor...." Read more
"...you only use the sideboard in certain situation but it does add some new cards and fun...." Read more
Customers enjoy the content of the expansion. They find it interesting, with new tasks and assets that work well for the game. The expansion adds depth and variety to the story, providing an added challenge and breathing new life into the game.
"...suggest picking up Forsaken Lore first; it includes additional Mysteries for the base set Ancient Ones, and fleshes out the Location decks...." Read more
"...Eldritch Horror fan this is worth the forty bucks as it not only brings new content but also adds more cards to the existing decks...." Read more
"...We just love the new preludes, and while it seems that they give you an added advantage, in our games at least, that is only an illusion - our win..." Read more
"...-Unique tasks and assets are an interesting concept that works out well for the game (although it is one other deck to keep track of)...." Read more
Customers find the expansion a good value for money. It adds great components and extends playability of the base game. Many consider it a must-have for fans of Eldritch Horror.
"...It adds some great components, and includes a fun addition to the game without making it too cumbersome...." Read more
"...If you're an Eldritch Horror fan this is worth the forty bucks as it not only brings new content but also adds more cards to the existing decks...." Read more
"...This expansion definitely adds quite a bit to the base game, extending playability and making great adjustments to the mechanics of the game...." Read more
"Mountains of Madness is a great addition to my Eldritch Horror board game...." Read more
Customers appreciate the new cards, investigators, tokens, and side board. They find the new characters and abilities great. The unique asset cards are also appreciated. While some feel the expansion is necessary, others consider it a nice addition.
"...forty bucks as it not only brings new content but also adds more cards to the existing decks...." Read more
"...Adds lots of new variety in the game with a ton of new assets, 8 new characters, some new spells and conditions, 2 new ancient ones to fight, a..." Read more
"...New characters, mythos cards, and encounter cards are always welcome." Read more
"...The Unique Asset cards are mostly good, although some of them should have been normal assets in my opinion." Read more
Customers enjoy the variety of characters in the board game. They find the new monsters and detectives fun.
"...A few initial thoughts: 1. The new characters integrate seamlessly into the game, and are a needed addition...." Read more
"...Adds lots of new variety in the game with a ton of new assets, 8 new characters, some new spells and conditions, 2 new ancient ones to fight, a..." Read more
"...New characters, mythos cards, and encounter cards are always welcome." Read more
"...Love the new characters & other cards though. Lots of great abilities!" Read more
Customers appreciate the quality of the board game. They find it a fun expansion and well-done. The new Goo cards provide an added challenge.
"Amazingly well done! It is kind of sad that you only use the sideboard in certain situation but it does add some new cards and fun...." Read more
"...-The new GOO are excellently well done, and provide an added challenge. One extends the playtime by about 33%, and the other is HARD...." Read more
"...to admit we destroyed ithiqua (however you spell it), gaining the best score and the most uneventful game we have ever played...." Read more
"...the box was slightly damaged on the outside but the contents were unharmed!" Read more
Customers like the speed of the board game. They say it makes the game go faster, comes quickly as promised, and doesn't overcomplicate it. The changes are welcome and improve the game.
"...(in my opinion, they make the game go a lot faster)..." Read more
"...In all seriousness though, it definitely improves the game and I'd recommend it to anyone who enjoys the base game..." Read more
"...Doesn't overcomplicate the game, but brings a couple new (and welcome) changes--especially the focus system and the new investigators!" Read more
"love this game/came quickly as promnised" Read more
Customers like the board size. It adds a new sideboard and another board.
"...It adds a bunch of new cards, new investigators, new tokens, and a new side board...." Read more
"Great expansion, adds a new sideboard which is only used for one of the ancient ones or with the included Prelude card...." Read more
"This adds a good amount of items to the game, included another board...." Read more
Reviews with images

Top reviews from the United States
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- Reviewed in the United States on February 8, 2015Overall, this expansion is a great, though pricey, addition to Eldritch Horror. A few initial thoughts:
1. The new characters integrate seamlessly into the game, and are a needed addition. WIth only 12 characters in the base game, there was definitely a need for some additional options. The eight characters in this expansion add some much needed variety.
2. The new Mythos, Location, Expedition, Asset cards, etc. also add more variety. Some of the new cards utilize some new mechanics that will help keep the game fresh.
3. The Antarctica sideboard and new Ancient Ones: overall, I think the Antarctica board is a little bit clunky; I don't think it adds all that much to the game. There are six new Prelude cards that include a specific scenario at the beginning of the game. Out of these, only one calls for the use of the Antarctica board. The only other time you use the Antarctica board is when you use the new Rise of the Elder Things Ancient One. For what it's worth, that specific scenario is a lot of fun to play through (I had been hoping for an Arkham Horror expansion based on At the Mountains of Madness for years), but otherwise it feels a little unnecessary. The new Ancient Ones both have interesting mechanics and were very enjoyable to play with.
4. The new Focus action: there is a new action investigators can take, which allows them to collect a new Focus token. The Focus token functions similarly to the the clue tokens when rolling the dice during tests; you can spend one in order to re-roll a die. I think they are a useful, though unnecessary addition.
Overall, if you enjoy Eldritch Horror, this expansion is definitely worth picking up. It adds some great components, and includes a fun addition to the game without making it too cumbersome. If you only have the base set of Eldritch and you're deciding between this expansion and Forsaken Lore, I would suggest picking up Forsaken Lore first; it includes additional Mysteries for the base set Ancient Ones, and fleshes out the Location decks. Since Forsaken Lore adds components specifically for the base set Ancient Ones (thereby augmenting the existing components while adding a few more), I would highly recommend buying it before picking up Mountains of Madness.
- Reviewed in the United States on May 12, 2015This is the second expansion of Eldritch Horror and is a 'big box' expansion. It adds a bunch of new cards, new investigators, new tokens, and a new side board. If you're an Eldritch Horror fan this is worth the forty bucks as it not only brings new content but also adds more cards to the existing decks. That said, however, I'd argue that getting the first expansion 'Forsaken Lore' before getting this is a better investment as Forsaken Lore adds even more cards to the existing decks which really adds to re-playability. Mountains of Madness is still a great expansion, though, just not the first one I'd buy (but I did buy it).
- Reviewed in the United States on September 8, 2015A must have! The way they have done expansions for Eldritch Horror just blows Arkham Horror away! Now the game tells you when you want to use a sideboard or not (or you can choose the adventure or opponent that uses it) so you are not overwhelmed with expansions. Each expansion shows up to give your games a unique flavor. We just love the new preludes, and while it seems that they give you an added advantage, in our games at least, that is only an illusion - our win loss ratio has not changed. In fact, we beleive the extra "boost" that sometimes the prelude cards give is more of a "false hope" as the doom we are prearing to face is even worse then we orignally believed.
- Reviewed in the United States on May 24, 2015Amazingly well done! It is kind of sad that you only use the sideboard in certain situation but it does add some new cards and fun. It makes it more challenging but the Antarctic stuff is very well done. This is definitely one of my favorite Fantasy Flight Games products. It helps that I really love the Mythos. By the way, it really helps if you have friends that get into characters. A couple of my friends can play a mean Lola.
Some people have complained that the Cthulhu mythos isn't about globe hopping but I like the fact that FFG can try to move the mythos forward and do a good job of keeping the feel and the mystery. I also feel that they improved on all the challenges of Arkham Horror with this.
- Reviewed in the United States on December 21, 2015I am a huge fan of Eldritch Horror. This expansion definitely adds quite a bit to the base game, extending playability and making great adjustments to the mechanics of the game.
Pros:
-The new Focus action is a much needed bonus, giving your character something useful to do with a spare action.
-The new GOO are excellently well done, and provide an added challenge. One extends the playtime by about 33%, and the other is HARD. They are unique in their playstyle from any other GOO.
-Unique tasks and assets are an interesting concept that works out well for the game (although it is one other deck to keep track of). The tasks themselves provide the player with a bonus objective, usually requiring a level of sacrifice, but with a substantial reward. The unique assets are similar in the way they are acquired, but I believe this feature could've been integrated into one of the original assets instead of forming its unique deck (see "feature creep" below).
-The new playable characters are unique in their abilities and playstyles, and some will make permanent additions to your game.
My two main complaints are:
-The box is much larger and bulkier than what is required to hold the components of the game. The box is the same size as what is used for the base game, while the added content could fit in a box 1/3 of the size. True to the Fantasy Flight brand, the box organization and spacial allotment is downright awful.
-As with other expansions, and with other Fantasy Flight games, there is a major case of "Feature Creep". More unique decks are thrown in, with more unique tokens, featuring more unique mechanics. I'd rather the game flush out and fine tune the existing decks and mechanics, instead of increasing the amount of new content. More is not always better, and longer playtime with more components does not always make a game more enjoyable.
Top reviews from other countries
- Giovanni R.Reviewed in Mexico on November 26, 2024
5.0 out of 5 stars Quality stuff
This game is so adictive even when is SO HARD, expect 9 out of 10 defeats, still every one will have fun and its as fun with 2 player as with 6. The more players the longer the game will be and its A LONG game! Do not lose the game pieces!
Antartica is the new setting for this expansion and it has its own rules, you will need a BIG table or two tables to play this, ITS HUGE! New rules, new investigators, new ancients, pure fun!!
- parkerReviewed in Canada on September 23, 2022
5.0 out of 5 stars Early delivery!!!!
It came 2 weeks sooner than promised. I am so happy to have this game now
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schmeregaReviewed in Brazil on December 18, 2020
2.0 out of 5 stars O tal do envio ruim!
Infelizmente não ouve proteção satisfatoria no envio, creio que tive sorte por não ter estragado a tampa da expansão, apenas a base. O conteúdo dentro esta intacto, mas enviar um produto para outro país apenas com um plástico, pra mim, parece relaxo.
schmeregaO tal do envio ruim!
Reviewed in Brazil on December 18, 2020
Images in this review
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LauraReviewed in Spain on April 1, 2022
5.0 out of 5 stars Regalo perfecto
Si te gustan los juegos de mesa este es perfecto. Pero hay que tener en cuenta que es una ampliación y hay varias, todas geniales si tienes el juego base.
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ClientReviewed in France on September 30, 2020
3.0 out of 5 stars Emballage pas à la hauteur...
Le jeu nageait dans l'emballage d'Amazon, pas de cale ni de papier bulles. Conclusion : les coins de la boîte du jeu sont abîmés... Dommage.
Par contre, le jeu est excellent. Qualité FFG