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Unfathomable
The year is 1913. The steamship SS Atlantica is two days out from port on its voyage across the Atlantic Ocean. Its unsuspecting passengers fully anticipated a calm journey to Boston, Massachusetts, with nothing out of the ordinary to look forward to. However, strange nightmares plague the minds of the people aboard the ship every night; rumors circulate of dark shapes following closely behind the ship just beneath the waves; and tensions rise when a body is discovered in the ship's chapel, signs of a strange ritual littered around the corpse.
What is Unfathomable
The year is 1913. The steamship SS Atlantica is two days out from port on its voyage across the Atlantic Ocean. Its unsuspecting passengers fully anticipated a calm journey to Boston, Massachusetts, with nothing out of the ordinary to look forward to. However, strange nightmares plague the minds of the people aboard the ship every night; rumors circulate of dark shapes following closely behind the ship just beneath the waves; and tensions rise when a body is discovered in the ship's chapel, signs of a strange ritual littered around the corpse.
Lurking within the depths of the Atlantic Ocean are a swarm of vicious, unspeakable horrors: the Deep Ones, led by Mother Hydra and Father Dagon. For reasons unknown, they have set their sights on the Atlantica, and their minions, taking the form of human-Deep One hybrids, have infiltrated the steamship to help sink it from within. Each game of Unfathomable has one or more players assuming the role of one of these hybrids, and how well they can secretly sabotage the efforts of the other players might mean the difference between a successful voyage and a sunken ship.
If you're a human, you need to fend off Deep Ones, prevent the Atlantica from taking too much damage, and carefully manage the ship's four crucial resources if you want any hope of making it to Boston, all while trying to figure out which of your fellow players are friends and which are foes. Everyone shares the same resource pool, but humans will try to preserve them while traitors will strive to subtly deplete them. Being able to tell when someone is purposefully draining the group's resources is harder than you think, especially when you take crises into account!
At the end of each player's turn, that player must draw a mythos card. Each of these cards represents a crisis that the whole group must try to resolve together. Some of these crises, such as "Food Rationing", call for a choice that could potentially put the ship's passengers or resources at risk, while others, such as "Hull Leak", call for a skill test in which failure could have disastrous consequences.
Game details
- Players
- 3–6
- Age
- +14
- Duration
- 240 min
- Difficulty
- Heavy
- Type
- Board game
- Year
- 2021
- Mechanics
- Area Movement · Hand Management · Hidden Roles
- Categories
- Bluffing · Deduction · Fantasy
- Designer
- Corey Konieczka · Tony Fanchi
- Publisher
- Fantasy Flight Games · ADC Blackfire Entertainment · Delta Vision Publishing · Galápagos Jogos
Unfathomable gallery
Unfathomable on Meeplay
See what the Meeplay community plays and thinks about Unfathomable, and add your own plays to the record.

What the community says about Unfathomable
Very similar to battlestar galactica, fun game, lot of talking, not my fav kind of game but we have a good time playing it. Seems to be very dificult to win as the good ones!
Es una especia de reimplementación del juego de galáctica (El juego de roles), pero ambientado en el mundo de lovecraft, donde los humanos, a bordo de un barco que va siendo atacado por unos mostruos profundos procedentes del abismo, tienen que tratar de llegar a su destino (EEUU) antes de que se agoten alguno de los contadores (cordura, combustible, comida o almas) salvando a los pasajeros de las incursiones de las criaturas, y luchando contra los profundos y arreglando los desperfectos que se van produciendo en el barco. Es un cooperativo de roles ocultos en el que hay muchas cosas que hace
This is the game that really pushed me into the hobby I would totally recommend it to anyone who is into social deduction games
Se me hizo un pelín repetitivo, pero nos echamos las risas, no estuvo mal
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Everything about Unfathomable
How many players is Unfathomable for?
Unfathomable plays with 3–6 players.
How long does a game take?
A game takes about 240 minutes.
What age is it suitable for?
It is recommended from age 14.
Unfathomable: From the Abyss
Stratego: The Chronicles of Narnia – The Lion, The Witch, and The Wardrobe
Feliz No Cumpleaños
A Study in Emerald
The Lord of the Rings: The Confrontation
Discworld: Ankh-Morpork

