This is a perfect information abstract game with a light theme of computer programming. Each player builds a small program that then modifies itself and the other programs on the board, trying to isolate the instruction marker of the other players so that it's the only running program in the memory. The game can be played with Icehouse pyramids (a Treehouse set per player), with the piecepack game system (one set for 2 players, 2 sets for 3-4 players) or with a standard deck of cards per player plus some pawns. Game System Icehouse Pieces Standard Deck piecepack game system