Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Alamo	Beat Stage 3 Level 6 in under 15 seconds.
Bowels	Beat Stage 4 Level 6 in under 10 seconds.
Burntown	Beat Stage 1 Level 7 in under 7 seconds.
Cathedral	Complete Stage 3.
Chimney Sweeper	Beat Stage 1 Level 5 in under 8 seconds.
Cosmos Belle	Beat Stage 6 Level 3 in under 10 seconds.
Cosmos Jackie	Beat Stage 6 Level 2 in under 16 seconds.
Cosmos	Complete Stage 6.
Dagon	Beat Dagon with the Broadsword. Must be the only weapon used during the fight.
Deeplings Woah	Beat Stage 2 Level 6 in under 10 seconds.
Ditch	Beat Stage 5 Level 4 with the Bubble Gun. Must be the only weapon used during the level.
Don't Stop	Beat Stage 4 Level 2 in under 11 seconds.
End	Complete Stage 5.
Gaze	Beat Stage 3 Level 1 in under 8 seconds.
Hive	Complete Stage 4.
Holes	Beat Stage 1 Level 3 in under 10 seconds.
Rally	Beat Stage 4 Level 4 in under 17 seconds.
Sewers	Complete Stage 2.
Slide	Beat Stage 1 Level 4 in under 12 seconds.
Slimewall	Beat Stage 3 Level 4 in under 15 seconds.
Stairway To...	Beat Stage 5 Level 2 in under 10 seconds.
Stake	Beat Stage 1 Level 2 in under 12 seconds.
Towney	Complete Stage 1.