Here is the full list of all 31 Heroes of Loot 2 achievements.
Use the Fire fist weapon
Level up the Valkyrie to level 5
Level up the Wizard to level 5
Use the Thunder claw weapon
Use the Soul sword
Enter the Forest
Find a coin room
Enter the snow area
Complete your first Bestiary info
Use an Afterlife rune
Reach dungeon 30
Level up the Warrior to level 5
Enter a sewer level
Defeat a Minotaur
Reach dungeon 10
Level up the Elf to level 5
Survive an Arena room
Collect all shard of a magic spell
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
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