Here is the full list of all 18 Sinner 97 achievements.
Escape without being heard
Escape without being seen
Escape without being attacked
Escape without dying
Escape with all evidence
Discover all cult member notes
Complete game on hard difficulty
Complete game on medium difficulty
Complete game on easy difficulty
Complete game using the flashlight for less than 10 minutes
Complete game without healing
Collected teddy bear evidence
Collected computer evidence
Collected Father's gospel evidence
I don't eat meat (collected mystery meat evidence)
Collect parasite in jar evidence
Escape within 30 minutes
No one likes salting the snail, but she gives you no choice