Tantrix Xtreme is a more fiendish alternative to Discovery, mainly aimed at keen puzzlers or experienced Tantrix players.
It contains eight Discovery-type loop puzzles with an extra twist: no colour clue is given for each level. Two new tricky pyramid puzzles are added that provide an even greater challenge.
Your aim is to build loops of various shapes and sizes starting with just three tiles. Each new tile added gives you a different and more challenging puzzle!