Games are inherently one of the least efficient things out there, fun as -blam!-, but very inefficient. Therefore anything you do in a video game is inefficient so if you are that worried about efficiency stop playing videogames. You can play however you want, but please dont call it efficient.
Side note 1: (Unless of course you do reviews for a website with a lot of people reading and its part of your job then you guys are being efficient)
Side note 2: Cant wait to tally the amount of a certain phrase I get to hear now
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So working for money can be labeled efficient But an activity that doesnt result in material gain cannot? hmm Working hard to make money is the pursuit of happiness. If playing a game makes you happy then you cut out the middle step Seem very effiicient to me