Lovely Craft Piston Trap — Ear Rape Achievement

The achievement was not a reward. It was a . It told everyone online: "Look at this person. They fell for the most obnoxious trap ever built."

Use a piston to hit a mob directly on the top of its head; side hits do not count. Fireworks!: lovely craft piston trap ear rape achievement

If you are looking to clear more of the achievement list, here are a few other common ones: The achievement was not a reward