That's the deal, I don't have a concept for a quantum video game that I would like myself. The best example of quantum game I know is actually a sudoku - different cells extremely entangled and each number has a cloud of possibilities that would collapse into exactly one place.
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I agree, it is difficult to find quantum mechanics outside puzzle games. There is also a Quantum Chess game that works in a similar way. You might find this resource interesting: Quantum Fun.