Congratulations to Avri Klemer for Martian 12s, the winner of the Winter 2008 Icehouse Game Design Competition. It is a gambling game for two to five players, and like all the entries in this materials-restricted competition, it requires two (and only two) Treehouse sets to play.
A round of applause from The Gameshelf for all
twelve eight games entered into the contest! All are listed on the competition page, with links to each game's rules.