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