Here is the full list of all 42 Six Braves 🕌 achievements.
Any character has successfully challenged the Demon King
Adventure into the Magic Tower
To open the door you need to get the key, understand?
Killed the Green Slime that let go. If not killing Green Slimes is for the reward, then killing Green Slimes is also for the reward
Do you think you can kill a slime that's so cute?
Found the first hidden area
Solved the first puzzle
Defeat the first boss with a wizard
Defeat the first boss
Cursed
Found the secret room
Bypassed the Demon King's trap
Obtained the first sword in the game
Gain the ability to summon all summons
Sensed the ambush, but had no choice but to get hit
Use Assassin character to enter Magic Tower
Enter the Magic Tower with a wizard character
Use a summoner character to enter the Magic Tower
Defeat the vampire
Defeat the Mage of Light
No way, someone even stole the tombstone?
Defeat the Demon Knight
Solve the 45th floor puzzle
45 floors must have a number of 45
Enter the dark room on the 46th floor
Enter the 53rd floor
A long dream, still moving after waking up
It's a trial~
The birth of a demon king is never an accident
Friendship is especially precious under the extreme
The destruction of the world by numerical explosion
Saved the Demon King, but is the Demon King still the original Demon King?
Unlocked character - Wizard
Unlocked Character - Assassin
Unlocked Character - Summoner
Unlocked Character - Undead Warlock
Unlocked Character - Knight
Defeat the Dragon
Pass medium (or higher) difficulty
Pass Hard (or above) difficulty
Pass Hard 50 (or higher) difficulty
Level 99 (or higher) on Extreme difficulty