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