Here is the full list of all 26 Antidote achievements.
You've escaped the lab, but...
Open the door of the medical room
Open the door of the medical room without using the digicode
Exit the lab during the fire
Hodor
Make the antidote
You tried to cure yourself, but too late...
You healed you before the first visual symptom
Open the hidden locker
Finish the game in easy or medium difficulty using no tip
Moo.
Make the antidote without the use of the whiteboard
Finish the game faster than the dev himself
Finish the game in expert mode at first launch