| Achievement | How to unlock
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|---|
| A Day as a Bookworm | Complete the Chapter: "The Chronicles of the Guardian"
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| A Friend of "Poetry" | Complete the Chapter: "A Forgotten Parchment"
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| Academy Outskirts, Perfected | Collect each Trineangle from the Chapter: "Academy Outskirts"
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| All Your Collectible Are Belong to Me | Collect each Trineangle from every Chapter
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| An Exit Strategy | Complete the Chapter: "A Lonely Knight"
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| An Itch for the Shiny | Complete the Chapter: "A Brush with Death"
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| But It Belongs in a Museum! | Complete the Chapter: "The Three Heroes - Zoya"
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| Graduated With Honors | Complete the Chapter: "The Astral Academy"
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| Holey Moley! | Complete the Chapter: "A Tumble Down"
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| I Dreamed a Fireball (almost) | Complete the Chapter: "A Wizard's Epiphany"
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| I Like Turtles | Complete the Chapter: "The Three Heroes - Amadeus"
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| Icing the Cake | Earn every Achievement in Trine 3: The Artifacts of Power
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| K.O. | Beat the final boss
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| No School Today | Complete the Chapter: "A Wizard's Nightmare"
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| Sheep Happens | Complete the Chapter: "The Three Heroes - Pontius"
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| Stop Busting My Walls | Complete Academy Outskirts
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| The Academy Champion | Survive through the Chapter: "An Academic Invasion"
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| The Astral Academy, Perfected | Collect each Trineangle from the Chapter: "The Astral Academy"
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| The Chronicles, Perfected | Collect each Trineangle from the Chapter: "The Chronicles of the Guardian"
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| The Conqueror of Dangers | Survive through the Chapter: "A Dangerous Outing"
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| The King of the Jungle | Survive through the Chapter: "A Squabble in the Jungle"
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| The Redwood Forest, Perfected | Collect each Trineangle from the Chapter: "The Redwood Forest"
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| The Silencer of Whispers | Survive through the Chapter: "A Whisper of Evil"
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| The Story Has Been Told | Complete all of the main story Chapters
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| The Three Heroes - Amadeus, Perfected | Collect each Trineangle from the Chapter: "The Three Heroes - Amadeus"
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| The Three Heroes - Pontius, Perfected | Collect each Trineangle from the Chapter: "The Three Heroes - Pontius"
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| The Three Heroes - Zoya, Perfected | Collect each Trineangle from the Chapter: "The Three Heroes - Zoya"
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| Timber! | Complete the Chapter: "The Redwood Forest"
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