Using the ore mined from the Unitice meteor, humans have been able to develop the man-shaped robots known as UNITRONS. As a Unitron master, you control one of these mighty machines as you explore mysterious dungeons and fight for the ultimate prize in the Unitron Arena! Create - Collect - Trade! Build your own weapons for your Unitron using Arms and Material. There are over 200 possible combinations! Battles against fearsome monsters and skilled Unitron masters await you! If you can defeat them all, you too can become... The Master of Masters!