| Achievement | How to unlock
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|---|
| A Day in the Life of a Bun (20 points) | Appease Cinnamon Bun.
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| A Penny Burned (15 points) | Buy an item from Choose Goose.
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| Ambitreacherous (90 points) | Beat the game without upgrading Finn's Thumps, Sword, or Armor.
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| Bad Timing (20 points) | Win the race against Starchy.
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| Be More (90 points) | Find every item in the entire game.
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| Blade of Grass (30 points) | Receive sword training.
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| Dungeon Train (30 points) | Find Slumber Princess.
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| Food Chain (15 points) | Buy any variety of Trail Mix.
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| From Bad to Worse (20 points) | Find a renewable light source.
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| Henchman (20 points) | Stun 5 enemies with a single Bananarang.
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| Level 99 (30 points) | Chop down 999 bushes.
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| Love Games (30 points) | Complete the circle of love.
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| Ocean of Fear (30 points) | Find Nightmare Princess.
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| Princess Day (20 points) | Get briefed on the mission.
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| Rattleballs (15 points) | Find a Gum Globe.
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| Red Starved (15 points) | Find a Thump Shard.
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| Sad Face (30 points) | Make a mess of the Pottery Shop until you get something nice.
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| The Enchiridion! (30 points) | Complete the Trading Game.
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| The Party's Over (20 points) | Dance the night away in the Rave Cave.
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| The Real You (30 points) | Find every secret Gunter cave.
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| The Red Throne (30 points) | Max out your Thump Meter.
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| Wake Up (30 points) | Find Lullaby Princess.
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