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