Sjörövarön ("Corsair Island") is a truly classic childrens game from Sweden, which was published by BRIO for a first time in the mid-1950's and sold for some 5-10 years. Later Joker (BRIO's board game division) would re-release the game in the early 1980's, followed by Alga in around 1985 (when Alga had been purchased by BRIO and replaced Joker as the companys board game arm.) It is now out-of-print.
The game is played in three stages. In the first stage you have to take the map pieces from the other players.
Second stage: When you have all the pieces, you know where the treasure is located (since you would know which part Captain Kidd has swallowed = missing) and you can rush away to the hidden place to get the treasure chest.
In the third and last stage, you have to run away, either with the raft or with one of the rowing boats the player arrived with. All the time the other player can get the map pieces or the chest from you, so you need to be quick and careful.
Of course the pirates may duel with pistols and shoot with the cannon - placed in the centre of the island - at each other!
The game were sold with fine metal (tin) playing pieces: six pirates, a raft, a cannon and, of course, the treasure chest (fitted with a steel ring so it could be hung on the pirate playing piece representing who had custody of the treasure!).