City Under Siege Integer

An air force attack surprised a city called Sunray City. Thousands of people die except Sanders that slept over in the dorm. His meeting with Lt. Isaac began his journey in defending the city.

This game is:
- pre-rendered 3D;
- available in four operation (+, -, x, /) for integer operation;
- intuitive and easy to play;

This game has:
- varies enemy with special ability;
- 20 achievements;
- selectable difficulty (3);
- survival mode and high scores;

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