| Achievement | How to unlock
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| A Legend in His Own Grime (25 points) | Get 25 Legend arena scores.
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| A Perfect 10 (25 points) | Take no damage and achieve Legend status in 10 arenas.
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| All Your Base (15 points) | Complete Mission 6.
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| An Embarrassment of Liches (25 points) | Kill 5,000 zombies.
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| Arm Robbery (20 points) | Harvest each type of enemy that can be harvested.
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| Armed and Dangerous (10 points) | Yaiba gets an armful.
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| Better Dying Through Chemistry (10 points) | Cause 50 elemental effects.
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| Breaking Baddies (10 points) | Congeal 50 enemies with bile crystals.
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| Can't Touch This (20 points) | Counter each enemy type.
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| Card-Carrying Dismember (10 points) | Kill 1,000 zombies.
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| Chain of Command (10 points) | Achieve a 50-hit streak.
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| Cold Shard Cash (25 points) | Collect all the elemental shards.
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| Combination On Lock (15 points) | Achieve a 100-hit streak.
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| Cremation Station (10 points) | Yaiba directs traffic.
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| Echo Location (15 points) | Complete Mission 4.
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| Elementary, My Dear Monday (10 points) | Cause each type of elemental effect on zombies and in the environment.
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| Flower Power (25 points) | Collect all the health shards.
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| Gate Crasher (10 points) | Destroy an obstacle with elemental effects.
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| Hell or High Slaughter (100 points) | Complete every Mission on Hell difficulty.
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| I Hate That Guy (15 points) | Complete Mission 5.
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| Insert Coin (10 points) | Play Arcade Mode.
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| Izuna Drop the Mic (50 points) | Complete every Mission on Hard difficulty.
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| Just the Tip (15 points) | Complete Mission 1.
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| Knockout King (20 points) | Execute each type of enemy that can be executed.
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| Limb Swim (10 points) | Chain 5 or more executions together.
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| Lust for Unlife (10 points) | Activate Bloodlust 10 times.
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| Mad Splatter (10 points) | Yaiba reveals a family secret.
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| Makes Me Want to Throw Up (10 points) | Throw 50 zombies.
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| Ninja Turdle (15 points) | Complete Mission 3.
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| Ninjacked (75 points) | Complete every Mission on Nightmare difficulty.
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| Patient 0 (10 points) | Create 7 plague clouds.
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| Perky (50 points) | Unlock all of Yaiba's upgrades.
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| Quartermaster (25 points) | Complete Arcade Mode.
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| Reheated Leftover (10 points) | Yaiba doesn't sleep well.
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| Rubble Trouble (10 points) | Yaiba survives quite the tumble.
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| Slight Turbulence (10 points) | Yaiba has a rude awakening.
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| Snot My Problem (10 points) | Yaiba gets his hands dirty.
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| Staycation (10 points) | Yaiba gets some fresh air.
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| Stone Carver (25 points) | Complete Mission 7.
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| Swords and Swollcery (10 points) | Yaiba brings up a good point.
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| That's Pretty Deep (10 points) | Yaiba finds religion.
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| That's a Clown Question (10 points) | Yaiba joins the crowd.
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| The Accidental Tourist (10 points) | Yaiba sets aside time for traveling.
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| The City is Slicker (15 points) | Complete Mission 2.
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| The Miracles of Science (10 points) | Yaiba returns to the scene of the crime.
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| Time to Kill (10 points) | Enter Ninja Time 50 times.
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| Too Many Words (50 points) | Collect all of the story collectibles.
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| Valedictgorian (60 points) | Get 50 Legend arena scores.
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| Well-Soiled Machine (25 points) | Achieve a 200-hit streak.
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