Here is the full list of all 22 Sudoku RPG achievements.
Defeated 100 monsters!
Passed through the snow area
You've earned 6000 gold so far.
Defeated 50 monsters!
You've earned 3000 gold so far.
Passed through the swamp area
Passed through the desert area
You've earned 1000 gold so far.
The tower of ordeal is available.
Defeated 20 monsters!
Passed through the forest area
You've earned 100 gold so far.
Defeated 5 monsters!
The tutorial is complete!
The adventure has begun!
Defeated 150 monsters!
Defeated 200 monsters!
Defeated 300 monsters!
You've earned 10000 gold so far.
The world has become peaceful!
Defeat Demon King Without Artifacts
Collect stars from all stages