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