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