Full list of all 11 Storm Boy achievements worth 1,000 gamerscore. It takes around 0-0.5 hours to unlock all of the achievements on Xbox One.
Have all 3 Pelicans get angry during the Feeding Mini-Game
Save the Sailors from a Sinking Ship
Have Mr Percival Fetch the ball from underwater 3 times
Swim to the deepest part of the Ocean
Find 20 Cockles
Say Goodbye to Mr Percival
Play each Mini-Game once through the Remember menu.
Feed all 3 pelicans once
Change Direction in the Sanctuary Dream mini-game 15 times
Leave an artwork on the beachfront
Stay underwater for the maximum amount of time