Video-game UI built around wireless plastic sword

I'm not exactly sure how this works — machine translation from Japanese being somewhat unreliable — but it sure looks cool. It's a video-game system called DragonQUEST, whose CPU is a little plastic shield the size of a pack of cards that wires into your TV, and whose user-interface is a toy plastic sword that communicates its position to the CPU, so that you work your way through the game by slashing vigorously with the sword.

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