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