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