Here is the full list of all 30 Endless Fables: Shadow Within achievements worth 1,000 gamerscore.
You creatively fixed the train door.
You read a fable to a young girl.
You retraced Agatha's clues.
You snuck into the castle.
You entered another world.
You smoothly prepared a remedy.
You boldly visited through the dreams.
You acquired the knowledge about the Sandman.
You became a friend of the Fluffs.
You repaired a flying boat.
You defended your friend's soul.
You skillfully avoided the shadogs.
You saved a nearly lost soul.
You uniquely defeated the Sandman.
You patiently listened to the Fluff's story.
You flew high up in the sky.
You dexterously got inside the hive.
You've virtuously defeated the Queen of Wasps.
Finish a Hidden Object Puzzle in 90 seconds.
Finish a Hidden Object Puzzle without any mistakes.
Finish a Hidden Object Puzzle without using Hint.
Finish all Hidden Object Puzzles without any Hints.
Complete a Minigame in 60 seconds.
Complete four Minigames without skipping.
Complete four Minigames, each in less than 60 seconds.
Complete all Minigames without skipping.
Collect all figurines.
Collect all puzzle pieces.
Play through all story-telling Minigames without skipping.
Open the Map at least once.