The Octagon is a two-decks patience. The game is begun by dealing eight Aces to the foundations and 20 cards to the tableau piles of 5 cards each. The remaining cards form the stock. The waste pile is beside the stock.
The object of the game is to build eight foundation piles up in suit running from Ace to King.
You can build tableau piles down in suit. Only the top card of a pile is available to play.
If a space in the tableau is created, three cards are dealt to it from the waste pile (or from the stock if the waste pile is empty). After both the waste pile and stock are empty, you can fill the space with any card. The stock can be reused three times.