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