Problem to be solved: to provide a multi - 1 game in which a plurality of users gathered in the same place collaborate with objects in one virtual space without using a special controller.For the game deviceAn object detector 21 for detecting a position of a plurality of real objects from a predetermined area andAn object control section 22 for placing game objects in a virtual areaCollision detection unit 23 which detects collision between each of the plurality of player objects located at a position corresponding to the detection position of a plurality of real objects in the virtual domain and collision with the game objectParameter update section 24 which updates the in game parameters every collision is detected andA drawing section 25 for generating a game screen by drawing a virtual area andA display section 26 for displaying a game screen at a location capable of viewing from a predetermined area andWas provided.Diagram
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