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