Super Lucky's Tale

This can be unlocked in the fifth level ‘Tar Springs’ in the Holiday Canyon world. As you begin the level head forwards to the Yeti next to the hot tub and you’ll talk to him automatically. He’ll ask you to help him find his inner tube.

Now head to the left and jump onto the platform with the flower enemy and kill it. Instead of heading right up the bone bridge, jump onto the platform to your right and behind the bush you’ll find the inner tube. Simply grab it and bring it back to the Yeti to unlock the achievement.