Here is the full list of all 52 Dawnsbury Days achievements.
Win an encounter with four characters of the same class.
Win an encounter without casting spells or making Strikes.
Double-kill the demon lord and save Dawnsbury.
Cast a spell of 3rd level or higher.
Clear the skies of Dawnsbury.
Defeat the remaining dark poets.
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.
Defeat 80 enemy creatures.
Protect the walls of Dawnsbury.
Defeat the squad that teleported in.
Save Morning Dewdrop's sister.
Re-engage your kinetic aura mid-combat.
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.
Retrieve the Golden Candelabra.
Have 3 buffs on a single hero at the same time.
Defeat the dark skeleton.
Inflict positive damage on an undead with Heal.
Deal extra damage because of a creature's weakness
Defeat the protectors of the abandoned temple.
Make a Strike with a +1 weapon.
Make a Strike with a +1 striking weapon.
Perform a flurry of blows.
Defeat a kobold ambush.
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.
Kill three or more creatures using a single spell.
Cause an enemy creature to suffer from 3 different debuffs at the same time.
Grapple an enemy creature.
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.
Enter a rage.
Score a critical hit on a roll where you have 100% crit chance.
Make an attack of opportunity.
Command an animal companion.
Activate a blood magic effect.
Drain bonded item to regain a spell slot.
Inflict sneak attack damage.
Unleash your psyche.
Make a Spellstrike.