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The term “munchkin” overlaps with “power gamer” and, to a lesser extent, “twinker”. Which have since been euphemism treadmilled into “optimizer”. Interestingly, the origins of the term supposedly refer to a generational gap, with older players using it to refer to younger players who were concerned with winning in a cooperative game.

If you think about it, the contrary play styles and conflict could be described as the first edition war, am edition war before there were separate editions.