Here is the full list of all 27 Herald: An Interactive Period Drama - there are Book I & II achievements.
Make a sacrifice to keep order.
Demand the truth.
Be consistently rude to the senator.
Read the boy's letter.
Fail to prevent a desperate act.
Push the boy too far.
Tell the boatswain off.
Successfully convince the senator.
Discover the horrible truth.
Bring food to the prisoner.
The officer gets his way.
Betray the boatswain.
Go against the captain.
Fail to prevent a flogging.
End the quarrel.
Get your hands dirty.
Find stolen goods.
Remind the cook about his own pet peeve.
Find the monster.
Witness a performance.
Make the boatswain's favourite grub.
Serve the senator a highly flavoured meal.
Save a life.
Refuse ill-gotten gains.
Negotiate a compromise.
Listen in on a prayer.
Completely blend in while serving tea.