If you thought Su Doku was the biggest and most addictive craze sweeping the country, then you have to get your hands on Tantrix. Be warned, this is a highly addictive game. Like all truly great games, Tantrix is very, very simple to play, it can take from a few seconds to half an hour to complete a game, it's highly compelling, and yet there are very few rules. Containing a series of hexagonal tiles, each marked with a series of coloured lines and curves, Tantrix is a puzzle solving game. You can't just play one game, it really isn't possible. The second you've jubilantly completed your first puzzle, you just have to do another.