SumZero 1.0 (Windows) SumZero is a strategy game that will help you to develop your logic and mathematical abilities, is educative, amused and can be used by people of different ages Cost: $5 Buy full version       Trial version       Publisher: Neurobits     Descriptions SumZero 1.0 (Windows): SumZero is a strategy game that will help you to develop your logic and mathematical abilities, is educative, amused and can be used by people of different ages