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