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