| Achievement | How to unlock
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| *SLAP* | Deal a killing blow to a boss with a Sword attack.
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| -10+9*8-7*6+5*4+3^2+1 = 50 | Reach a human combo of 50.
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| 2+2=/=5 | Reach a human combo of 5.
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| Because I can | Clear a single world while succeeding in every end-level minigame on any difficulty.
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| Bronze challenger | Earn 3 bronze medals in the Arena.
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| Burnt offerings | Complete Fire Caverns in arcade mode on any difficulty.
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| Conquering dystopia | Complete Machine City in arcade mode on any difficulty.
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| Doing it | Succeed in 10 end-level minigames in a row on any difficulty.
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| Experienced | Complete Arcade mode on Experienced difficulty.
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| Fea(s)ts! | Complete 100 feats.
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| Getting there | Complete 50 feats.
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| Gold challenger | Earn 9 gold medals in the Arena.
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| I was frozen today | Complete Crystal Mountain in arcade mode on any difficulty.
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| I'm prioritizing! | Defeat the Beamtron on Experienced difficulty with one or more enemies still alive.
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| It's a secret to everyone | Discover a secret level.
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| Last line of defense | Save all Humans and Secret Humans in a single world on Veteran difficulty.
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| Look at me go | Complete a feat.
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| Master | Complete Techno Forest on Master difficulty.
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| Nex Platinum | Complete all achievements.
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| Nihilist | Complete a single world on Experienced difficulty without saving any humans.
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| No touching | Clear a single world on Experienced difficulty or higher without getting hit.
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| Not in my house | Save a human while it's being harvested.
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| Rookie | Complete Arcade mode on Rookie difficulty.
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| Silver challenger | Earn 6 silver medals in the Arena.
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| Someone must construct additional beacons | Destroy every Secret Beacon in a single world.
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| Storm Runner | Beat Machine City on Experienced difficulty in under 5:45.
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| Timber! | Complete Techno Forest in arcade mode on any difficulty.
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| Utterly experimental | Complete Future Labs in arcade mode on any difficulty.
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| Veteran | Complete Arcade mode on Veteran difficulty.
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