Triopoly is a board game by Reveal Entertainment. It is much like Monopoly, but instead of the traditional two-dimensional board, it has three boards stacked on each other in a pyramid. This adds to the difficulty of the game. This difficulty is within the fact that the properties are now spread over all layers of the board. Another added twist to the game is a gambling aspect, which one takes part in by landing on certain spaces or by drawing the appropriate card.
References
Triopoly (board game) Wikipedia(Text) CC BY-SA