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