Forbidden Island

AI-friendly board game rules summaries — use with Claude, ChatGPT, or any AI assistant

Overview

Forbidden Island is a cooperative adventure game where 2-4 players work together as a team of adventurers to capture four sacred treasures from a sinking island. Players must collect sets of Treasure cards, claim the treasures, and escape by helicopter from Fools’ Landing before the island sinks beneath the waves. If the island floods too quickly or key tiles sink, all players lose.

Components

Setup

  1. Create the Island: Shuffle 24 tiles and lay them face-up in a diamond pattern: 2-4-6-6-4-2 rows (cross shape). Leave small gaps between tiles.
  2. Place Treasures: Set 4 treasure figurines around the island.
  3. Divide Cards: Separate into Flood deck (blue), Treasure deck (red), and Adventurer cards.
  4. The Island Starts to Sink: Shuffle Flood deck. Draw 6 cards, flipping the corresponding tiles to their flooded (blue/white) side. Place drawn cards face-up as the Flood discard pile.
  5. Assign Adventurers: Shuffle and deal 1 Adventurer card per player. Place matching pawns on their starting tiles. Each adventurer has a unique special power.
  6. Deal Treasure Cards: Deal 2 Treasure cards to each player (face-up). If anyone gets Waters Rise!, replace it and reshuffle.
  7. Set Water Level: Place the Water Level marker on the desired difficulty (Novice, Normal, Elite, or Legendary).

Turn Structure

On each turn (clockwise, starting with the player who last visited an island):

1. Take Up to 3 Actions

Choose from:

2. Draw 2 Treasure Cards

Draw 2 cards from the Treasure deck. If you draw a Waters Rise! card:

Hand Limit: Maximum 5 Treasure cards. If over the limit after drawing, immediately discard down to 5.

3. Draw Flood Cards

Draw Flood cards equal to the current Water Level (2-5 cards):

Actions

Adventurer Special Powers

Adventurer Power
Explorer May move and shore up diagonally
Pilot May move to any tile once per turn for 1 action
Navigator May move other players up to 2 tiles per action
Diver May move through 1+ missing/flooded tiles for 1 action
Engineer May shore up 2 tiles for 1 action
Messenger May give Treasure cards without being on the same tile

Special Action Cards

Scoring / Victory Conditions

Win Condition: All four conditions must be met:

  1. All 4 treasures have been captured.
  2. All players are on Fools’ Landing.
  3. A player plays a Helicopter Lift card to escape.

Lose Conditions (any one triggers defeat):

Special Rules & Edge Cases

Player Reference

Turn Sequence

  1. Take up to 3 actions (Move, Shore Up, Give Card, Capture Treasure)
  2. Draw 2 Treasure cards (resolve Waters Rise! immediately)
  3. Draw Flood cards = Water Level

Water Level Track

| Level | Flood Cards Drawn | |——-|——————| | 1-2 | 2 | | 3-5 | 3 | | 6-7 | 4 | | 8-9 | 5 | | Skull | GAME OVER |

Treasure Capture Requirement