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Additional handling fees may apply. Robots control the galaxy and the fate of the universe lies in question. Armed with an experimental spaceship, you must put your math skills to the ultimate test as you blast through space to defend the human race and defeat the robotic rulers. Master math skills in a variety of brain-busting categories, including addition, subtraction and multiplication. Whether competing with a friend in Four Player Battle Mode, or testing your computation abilities in Challenge or Adventure modes, you multiply, add and subtract your way through three difficulty levels.