Here is the full list of all 27 Miasmata achievements.
Beat the game in 3 days or less
Beat the game in 7 days or less
collect 32 unique plant/fungi
Light every urn on the island
Distract the creature
Successfully hide from the creature
Hit the creature with an orange
Collect every note
Hit the creature with a banana
Map the entire mainland coastline
Synthesize a Herculean Tonic
Synthesize a Mental Stimulant
Synthesize an Energy Stimulant
Go to the island's highest point
Add all head statues to the map
Synthesize Brain Emphasis
Hit the creature with a tin can
Synthesize Muscle Emphasis
Synthesize Endurance Emphasis
Synthesize Basic Medicine
Synthesize a Clarity Tonic
Hit the creature with an apple
Triangulate a distant landmark
Use every medicine
Synthesize Extra Strength Medicine
Die from drowning
Triangulate your location