Here is the full list of all 114 Heroes of Hammerwatch achievements.
Use a Blood Altar.
Find 50 secrets.
Find the Magic Anvil.
Acquire a companion.
Defeat the Watcher.
Consume 10 drinks at the Tavern.
Defeat the Three Councilors.
Unlock the Wizard.
Receive a reward from the Imp.
Unlock the Priest.
Unlock the Thief.
Defeat the Warden.
Try your luck at item gambling.
Unlock the prison cells.
Unlock Combo.
Use a monolith.
Defeat the Stone Guardian.
Beat the Forsaken Tower.
Defeat Thundersnow.
Reach level 20 with a Paladin.
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.
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+++++.
Craft 10 items at the Magic Anvil.
Attune 10 items at the Magic Anvil.
Defeat the Vampire Lord.
Construct the statue of Cedric.
Have your companion collect 1,000,000 gold.
Craft an item using the Magic Furnace.
Obtain 10 Blood Rites at the same time.
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.