Here is the full list of all 41 Pentiment achievements.
Convince Endris to find his sweetheart.
End Act I in the abbot's favor.
Convince Gernot to let you dig up the grave.
Learn about Artemis and Apollo's frog plan.
Get Martin killed.
Get Hanna killed.
Get Aedoc his medicine.
Refuse to shoot at the deer.
Do your penance.
Get knocked out.
Win everyone's money at Lansquenet.
Complain to Niko about your room.
Get Ferenc executed.
Get Matilda executed.
Get Ottilia executed.
Tell Jacob Estler immaterial gossip.
Encourage Paul to draw.
Get Wojslav to let you into the cellar.
Solve Ferenc's cipher with the volvelle.
Have your hat stolen.
Seduce Zdena.
Find the secret door to library.
Headbutt Werner.
Convince Illuminata to give you the French book.
Finished Act 3.
Cut enough cookies for everyone at the Christmas feast.
Learn the mystery of the cats.
Get assistance climbing down the mine shaft.
Finished Act 2.
Get Guy killed.
Shoot the deer.
Examine 10 flowers.
Pet 5 animals.
Discover the imposter.
Pass 5 dialogue checks.
Lose everything at Lansquenet.
Finished Act 1.
End Act I out of the abbot's favor.
Get Lucky executed.
Convince Jacob Estler to save Ottilia's home.
Spin wool as fast as the ladies.