Here is the full list of all 17 RUKIMIN's Disappointing Adventure! ~SHOBOMI AND THE PHANTOM RUINS~ achievements.
Clear with less than 5 deaths
Completed faster than 10 minutes.
Falling walls hold secrets.
Beat BLOCK KING! ver2.0
Completed the mission.
Game over on the game select scene.
Finished the tutorial.
Meet a PRINCESS BELL!
Returned to the starting point.
Died 100 times
Died 50 times
Eat rice balls
Beat BLOCK KING!
Died 10 times
Died once.
Game over on the title screen.
Overflowing from the screen.