I frequently move between very loud and quiet environments at work while needing to communicate with people. I highly recommend a comfortable pair of electronic ear muffs. Both Walker and Howard Leight make good pairs that won’t break the bank. If the battery dies, you just don’t get the “passthrough” effect and they’re just traditional ear muffs.
The dev picks the discount. If it’s at least 20%, Steam will email everyone that has the game wishlisted. It costs $100 to list the game on Steam; but if you make $100 in sales, you get that money back.