MATCHBOOKGAMES
Cheat the deep. Claim the treasure.

8 Arms Down

A competitive game of risky rewards

2–8 players15–30 minAges 8+Cards + dice

Something ancient with eight arms guards a mountain of doubloons at the bottom of the sea. You're diving anyway. Whoever holds the treasure controls the depth of the dive — everyone else decides how far they'll follow. One card too many, and the squid keeps the gold.

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Checkout happens off-site — this button links to the shop at launch.
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See it before you dive

Prefer paper? The full rulebook fits on one matchbook-size fold-out — read it in about three minutes.
How it plays

Every dive, four beats

Roll the depth

The Lead Diver rolls both dice. The total is the Max Dive Depth — the number every diver is racing to reach.

Lock your hand

Shuffle your Depth Cards face down. Shuffle all you want — once you stop, your hand is locked in.

Dive deeper

Flip cards one at a time, adding as you go. Stop whenever you like. Pass the Max Depth and you bust — out of the round.

Take the doubloon

Highest total without busting wins the round and the Doubloon. Win while holding it to advance a FATHOM — reach FATHOM 6 and win it all.

Photo: a dive in progress — game night, bar top, or road trip
Gameplay photo slot

In the box

  • Depth Cards 48 (8 sets of 6)
  • Diver Cards 8
  • Giant Squid Card 1
  • Dice 2
  • Doubloon 1

How you win

Win rounds while holding the Doubloon to descend, FATHOM by FATHOM. The first diver to win a round at FATHOM 6 with the Doubloon in hand resurfaces with all the treasure. Everyone else goes home empty-handed.

Fathom perks

The deeper you go, the stronger you get — take back a busted card, knock rivals up a level, cut their air entirely. At FATHOM 6 even the squid can't touch you.

Speed dive mode

Shorter on time? Every round win advances a FATHOM, and exact matches leap two. Same tension, half the evening.

Next match in the book

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