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