Fantasy Flight Games Unfathomable UNF01 Strategy Board Game

UNF01 Board: Fantasy Flight Games Unfathomable is a cooperative hidden-traitor strategy game set in the Arkham Horror universe. Players manage ship supplies and face threats while trying to identify concealed traitors, for groups of 3 to 6 and games listed at 120 minutes.

At a glance

Players cooperate to manage supplies and defend the ship, while hidden traitors may undermine the voyage.
The listing describes a 3–6 player game with a 120-minute estimated playtime.
The Arkham Horror setting and horror theme frame the game’s suspicion and hidden-loyalty mechanics.
The manufacturer lists a printed learn-to-play guide and rules reference.

Price

$61.49Save 32%

Reference price: ~~$89.99~~

Price checked: Nov 14, 2026

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Often bought together

Unfathomable: from The Abyss Board Game Expansion - Deeper Peril on The SS Atlantica! Cooperative Horror Strategy Game, Ages 14+, 3-6 Players, 2-4 Hour Playtime, Made by Fantasy Flight Games

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Pros and cons

Pros

Hidden loyalties add deduction and social uncertainty to cooperative play.
The 3–6 player range supports a larger group, and customer feedback says it shines with a full table.
A substantial listed set of cards, figures, tokens, player aids and rules materials supports varied game components.

Cons

Customer feedback describes a learning curve and says the game can run quite long.

Technical specifications

14 specifications

Identity
Brand listed	Asmodee
Model	UNF01
Game title	Unfathomable
Edition	Standard Edition
Language	English

Gameplay
Genre	Cooperative
Mechanics	cooperative, hand management, hidden traitor
Players	3 to 6
Estimated playing time	120 minutes
Recommended age	14 years and up
Theme	Horror
Power	No batteries required

Dimensions and weight
Dimensions listed	11.63 x 11.63 x 4 inches
Weight listed	2131 g

What to know before buying

Listing details to confirm

The title gives an average playtime range of 120–240 minutes, while the details list an estimated 120 minutes. The listing also gives conflicting age information: its title and manufacturer recommendation say 14+, while another age field says 3 years and a separate field gives 168. Treat the 14+ recommendation as the coherent stated guidance, but confirm the selected listing if these details matter.

What’s in the box

Included

1 Learn to Play
1 Rules Reference
1 Game Board with 4 Resource Dials
22 Plastic Monster Figures
10 Character Sheets
3 Traitor Reference Sheets
6 Player Reference Sheets
10 Character Standees
1 Current Player Token
4 Traitor Rings
9 Passenger Tokens
1 8-sided Die
1 Travel Token
1 Ritual Token
14 Loyalty Cards
70 Mythos Cards
2 Title Cards
20 Spell Cards
20 Waypoint Cards
20 Item Cards
9 Ship Damage Cards
10 Feat Cards
126 Skill Cards

Who is it for?

A good fit for

Groups of 3–6 who enjoy cooperative strategy alongside hidden-traitor deduction.
Players interested in a horror-themed game with ship-management tasks and concealed loyalties.
Game nights with enough time to learn the rules and play a potentially lengthy session.

Less suited to

Buyers seeking a quick, simple game or a clearly confirmed shorter session.
Groups smaller than 3 or larger than 6 players.

Fantasy Flight Games Unfathomable UNF01 Strategy Board Game · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.7 / 5 · 428 ratings

5 stars82%82%
4 stars12%12%
3 stars3%3%
2 stars3%3%
1 star0%0%

Customer feedback highlights strategic, enjoyable gameplay, appealing card presentation and acceptable component quality. Some feedback points to a learning curve and a long session, with one customer noting the game works best with a full group. Those considerations matter for a game listed for 3–6 players and estimated at 120 minutes, especially if your group prefers shorter or easier-to-learn games.

Positive themes

Customers describe the gameplay as fun and strategic and speak positively about the theme.
Customers praise the appearance of the cards and report acceptable piece quality.

Negative themes

Customers report that the game can be lengthy.

Mixed feedback

Feedback notes a learning curve, and one customer says it shines best with a full group.

Frequently asked questions

How many players can play Unfathomable?

The listed player count is 3 to 6.

How long does a game take?

The details list 120 minutes, while the title advertises an average range of 120–240 minutes. Plan for a potentially long session.

What kind of game is Unfathomable?

It is described as a cooperative strategy game with hand management and hidden-traitor mechanics, set in the Arkham Horror universe.

What age is it recommended for?

The title and manufacturer recommendation state 14 years and up. Other age fields conflict, so the listing’s age details should be treated cautiously.