| Achievement | How to unlock
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|---|
| A Colossal Warrior | Defeat Deikrag.
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| A Fly in our Web | Defeat Rhyvashi.
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| A Spider's Weapon | Purchase any Secret Arts item.
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| A Test of Valor | Find a Crystal Skull.
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| Art of the Inferno | Finish 1-2 without taking any Fire damage.
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| Be Always Brave | Unlock all the Achievements.
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| Better Equipped | Purchase any Talisman.
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| Bladewalker | Finish Act 3.
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| Demon Altar | Interact with a Demon Altar for the first time.
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| Demon Vanquisher | Slay 3,000 enemies.
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| Endless Struggle | Finish the secret final level.
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| Gold Hunter | Find a Golden Scarab.
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| Hanging in the Bullet | Finish 4-5 without falling into the abyss.
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| High Efficiency | Slay seven enemies at once using a single attack.
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| Inner Peace | Unlock Ending B.
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| Legacy | Finish the Prologue.
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| Legendary Hunter | Find all Scarabs.
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| Legendary Ninja | Get your first S++ rank.
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| Meliora | Find a Triple Scarab.
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| Ninja Revenge! | Slay any enemy that previously killed you.
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| Path of the Ninja | Finish Act 1.
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| Path of the Spider | Finish Act 2.
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| Secret Arts Collector | Purchase all Secret Arts items.
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| Shadow Warriors | Unlock and finish all Secret Ops levels.
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| Talisman Collector | Purchase all Talismans.
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| Tentacle Crusher | Defeat Obsidrae.
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| The Challenge of the Mountain | Finish 3-2 without dying.
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| The Fate of the Giant | Find all Crystal Skulls.
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| The Power of Two | Defeat Gurthka.
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| The Swiftness of the Spider | Finish 2-2 after picking up all collectibles on the same run.
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| The Way of the Hayabusa Clan | Slay 500 enemies with Hypercharged Attacks.
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| Ultimate Ninja | Get your first S rank.
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| Undercover Ninja | Unlock a Secret Ops level.
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| Venom | Unlock Ending A.
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| Weapon Hoarder | Purchase all items from Muramasa's Shop.
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| Window Shopper | Visit Muramasa's Shop.
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