Torus Games from Jeff Weeks and Geometrygames.org is the name of a free downloadable set of 8 simple games for Windows and Mac that, rather than being played on a 2-D plane, are played on the surface of a torus. Here you will find a twist on classic games like tic-tac-toe, pool, Minesweeper (called Apples here), and even a bizarre version of chess.