Treasure Island Online is an interesting experiment by Jesse Venbrux. Created in 2 days, the idea is that there's a treasure chest hidden under one of the tiles on show. The chest contains about 25 gold pieces, but each time you dig a tile, it costs 1 gold.

The twist is that the game board is connected to an online database, and every player can see the same board. So when another player digs a tile, you see the pit appear. Once the chest is found, the board resets.

So the question is, do you go digging and hope you find it before anyone else, or let them all waste their gold, then steal it from them with minimum effort? Go download it and find out.