Here is the full list of all 23 Phantaruk achievements.
Use antidote in the right way
Finish the first level
Get to the Bridge
Burn the corpses
Destroy your dreams
Find every antidote in the game
Finish every level (until Crematory) without being spoted by Phantaruk
Finish the game without taking any damages
Find all the text-logs
Find all the text-logs and text-scraps
Finish the biomed section without being spotted by clones
Finish the biomed2-2 section without being spotted by Phantaruk
Finish the game without using the flashlight
Use antidote 10 times
Listen to all the audiologs
Is he dead? Can he dream?
All those notes and pictures...
I need a bigger dose!
I'm from Earth.
I'm created.
Be careful and slow.
Run, clone, run!
He managed to escape. He found a better way.