Here is the full list of all 31 Heroes of Loot 2 achievements.
Use an Afterlife rune
Enter a sewer level
Level up the Elf to level 5
Level up the Wizard to level 5
Level up the Warrior to level 5
Use the Thunder claw weapon
Enter the Forest
Use the Soul sword
Find a coin room
Complete your first Bestiary info
Level up the Valkyrie to level 5
Defeat a Minotaur
Reach dungeon 10
Survive an Arena room
Collect all shard of a magic spell
Reach dungeon 30
Become level 10 player
Become level 20 player
Complete all quests at least once
Complete your Bestiary
Complete all magic books
Reach player status level 5
Find King Loot's lair
Defeat a Scarab Queen
Enter the snow area
Use the Fire fist weapon
Collect all hero cards for Thief
Collect all hero cards for Mage
Collect all hero cards for Paladin
Collect all hero cards for Barbarian
Walk on fire