This game was first published by Parker Brothers in 1971. It is in fact not a game in itself but a game system. The rule-book includes 15 games for 2-4 players and 7 puzzles for 1 player. The difficulties of the games are very variable. The parts and the board are without a doubt built to last, with a very ingenious system which makes the wheels "click". Pieces are in four different colors and are numbered. This even gives the possibility to note the games or ways to the solutions of the puzzles. And there is also a custom die! See Community Wiki for the list of games published with Orion.