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