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
Hit the creature with a tin can
Distract the creature
Hit the creature with a banana
Hit the creature with an orange
Map the entire mainland coastline
Collect every note
Light every urn on the island
collect 32 unique plant/fungi
Add all head statues to the map
Hit the creature with an apple
Go to the island's highest point
Synthesize a Herculean Tonic
Synthesize a Mental Stimulant
Synthesize Muscle Emphasis
Synthesize Endurance Emphasis
Successfully hide from the creature
Synthesize an Energy Stimulant
Synthesize Brain Emphasis
Synthesize Extra Strength Medicine
Synthesize Basic Medicine
Use every medicine
Synthesize a Clarity Tonic
Triangulate a distant landmark
Triangulate your location
Die from drowning