Here is the full list of all 52 Dawnsbury Days achievements.
Double-kill the demon lord and save Dawnsbury.
Clear the skies of Dawnsbury.
Defeat the remaining dark poets.
Protect merfolk children from an attack.
Survive an ambush on the open seas.
Defeat 80 enemy creatures.
Protect and retrieve the prismatic key.
Defeat the demon in the town sewers.
Protect the Golden Candelabra.
Protect the walls of Dawnsbury.
Defeat the squad that teleported in.
Make a Strike with a +1 striking weapon.
Save Morning Dewdrop's sister.
Open the gate with superior locks.
Defeat the dark shaman.
Survive a dangerous night.
Defeat the protectors of the old manor.
Save Morning Dewdrop from the elementals.
Command an animal companion.
Enter a rage.
Retrieve the Golden Candelabra.
Have 3 buffs on a single hero at the same time.
Make a Strike with a +1 weapon.
Defeat the dark skeleton.
Deal extra damage because of a creature's weakness
Inflict positive damage on an undead with Heal.
Defeat the protectors of the abandoned temple.
Make an attack of opportunity.
Defeat a kobold ambush.
Kill three or more creatures using a single spell.
Activate a blood magic effect.
Defeat puny kobolds.
Kill an enemy with a critical hit.
Win all encounters in the "Additional scenarios" encounter group. You don't need to win the "Training Grounds" encounter.
Win all encounters of the main adventure path on Hard difficulty or above.
Win all encounters of the main adventure path on Insane difficulty.
Deal at least 50 damage to a single creature with a single combat action.
Score a hit 10 times because of +1 circumstance or status bonus.
Cast a spell of 3rd level or higher.
Cause an enemy creature to suffer from 3 different debuffs at the same time.
Grapple an enemy creature.
Win an encounter with four characters of the same class.
Win an encounter without casting spells or making Strikes.
Win the whole adventure path without ever buying an item from the shop (not even during character creation).
Have all four heroes be Undetected at the same time.
Score a critical hit on a roll where you have 100% crit chance.
Drain bonded item to regain a spell slot.
Re-engage your kinetic aura mid-combat.
Inflict sneak attack damage.
Unleash your psyche.
Make a Spellstrike.
Perform a flurry of blows.