Here is the full list of all 114 Heroes of Hammerwatch achievements.
Defeat the Watcher.
Defeat the Three Councilors.
Unlock the Thief.
Defeat the Stone Guardian.
Reach level 20 with a Paladin.
Unlock Combo.
Receive a reward from the Imp.
Beat the Forsaken Tower.
Defeat Thundersnow.
Use a monolith.
Unlock the Priest.
Defeat the Vampire Lord.
Defeat the Warden.
Unlock the prison cells.
Unlock the Wizard.
Reach level 20 with a Priest.
Reach level 20 with a Ranger.
Reach level 20 with a Sorcerer.
Reach level 20 with a Thief.
Reach level 20 with a Warlock.
Reach level 20 with a Wizard.
Kill 75,000 Aberrations.
Kill 50,000 Beasts.
Kill 10,000 Constructs.
Kill 100,000 Undead.
Find 1,000,000 gold.
Find 1,000 ore.
Fully upgrade the Town.
Find 50 secrets.
Chain a combo of 500 kills.
Something good happened...
Reach level 40 with a Paladin.
Reach level 40 with a Priest.
Reach level 40 with a Ranger.
Reach level 40 with a Sorcerer.
Reach level 40 with a Thief.
Reach level 40 with a Warlock.
Reach level 40 with a Wizard.
Beat the Forsaken Tower in NG+.
Beat the Forsaken Tower in NG++.
Beat the Forsaken Tower in NG+++.
Beat the Forsaken Tower in NG++++.
Beat the Forsaken Tower in NG+++++.
Find the Magic Anvil.
Craft 10 items at the Magic Anvil.
Attune 10 items at the Magic Anvil.
Consume 10 drinks at the Tavern.
Construct the statue of Cedric.
Acquire a companion.
Have your companion collect 1,000,000 gold.
Craft an item using the Magic Furnace.
Use a Blood Altar.
Obtain 10 Blood Rites at the same time.
Try your luck at item gambling.
Win a legendary item by gambling.
Reach level 20 with a Witch Hunter.
Reach level 40 with a Witch Hunter.
Reach level 60 with a Witch Hunter.
Defeat the Elder Wisp.
Defeat Krilith's Wolf
Defeat the Agents.
Beat the Moon Temple.
Beat the Moon Temple in NG+.
Beat the Moon Temple in NG++.
Beat the Moon Temple in NG+++.
Beat the Moon Temple in NG++++.
Beat the Moon Temple in NG+++++.
Beat the Forsaken Tower with a mercenary.
Beat the Pyramid of Prophecy with a mercenary.
Beat the Moon Temple with a mercenary.
Recruit a mercenary private.
Reach Corporal rank with a mercenary.
Reach Sergeant rank with a mercenary.
Reach Lieutenant rank with a mercenary.
Reach Captain rank with a mercenary.
Reach Major rank with a mercenary.
Reach Colonel rank with a mercenary.
Reach General rank with a mercenary.
Purchase something at the Legacy Shop.
Block ten damage instances with your Lunar Shield.