Choose a preferred store for stock availability.
Unfathomable - Packshot 1
Unfathomable - Packshot 2
Unfathomable - Packshot 3
Unfathomable - Packshot 4
1 of 4


Click & Collect
No store set
Find your local store to view product availability.
Home Delivery
Starting from $5.95
Free Returns within 7 days
Pay by instalments with
Frequently bought together
Unfathomable + The Quarry + Disney - Winnie The Pooh Fleece Socks +
Total Price: $256.00 Save $32.95

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. This voyage began like any other, but now it seems that the Atlantica may never reach its destination.

Fantasy Flight Games is thrilled to announce Unfathomable, a brand-new board game in the Arkham Horror Files universe!

Immerse yourself among the passengers and crew of the SS Atlantica in this game of hidden loyalties, intrigue, and paranoia for three to six players. Some players are humans who are fighting for the survival of the ship, while others are traitors sent aboard the ship by mysterious beings to ensure that it never reaches port! Because player loyalties are hidden, determining who is friend and who is foe is critical to winning a thrilling game of Unfathomable.


  • Number of players: 3-6
  • Ages: 14+
  • Duration: 120-240 minutes
Franchise Pop Culture Brand Pop Culture Board Game type Strategy Game Number of Players 3+ Category Toys & Hobbies > Board Games Sku273525