How Randomness Is Important to a Theory of Games?

Theory of games could be a mathematical theory of games formulated, and it would tell you er that you should use er a. This would be in a world which is deterministic, where you can't toss a coin. But so so i said, no, what if the theory tells you to use some uncomputable sequence? Some sequence that is a good strategy would be one that looks random. So that would not violate the fact that such a theory of games wouldn't your opponent couldn't use it against you because no one can calculate such a sequence. It's oncas the implication from game theory, the fact that von noman had said, you know, randomness is important to