The objective of The Treasure of Montecristo Island is to survive together as a team long enough to find the treasure, avoid the Thief, and escape the island. The game is over when all living players return to their ship in the northwest with the treasure OR the Thief escapes to their ship in the northeast with the treasure.
In order to find the treasure, players must gather resources from the island to craft various items. These items are either useful tools in order to help them survive or the altars which are needed to located the treasure. Once all four alters are built and have been lit, the location of the treasure is revealed. Players must do all of this while not only surviving the dangers of the island, but also avoiding the Thief.
The Thief will hunt your players throughout the entire game; always trying to steal resources and deal damage to any player they cross paths with. Once the Treasure has been revealed, the Thief will only engage the player that is in possession of it. During this period of the game, the Thief will ignore other players in an attempt to get to the treasure. If the Thief manages to steal the treasure and get back to their ship the game is over.