Successfully complete the indicated task to unlock the corresponding achievement.

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