This achivement is really simple. Clear a Level 7+ song without collecting Red Hearts. Easy to do on the song MilK, since that song doesn't have red hearts.

Clear a stage without knocking back enemies. (You can jumps over saws tho) I recomend doing this on a level 1 song, since its easier. You can also use Zombie Buro just to be sure!

This achivement consists of 2 parts:

• Fail to clear the same stage 5 times! You can't just enter a stage and die inmidietly, it won't count, you have to play a bit before dying. I recomend doing this on a Master stage you can't pass.
  
  
  
  
  
  
• Fail to clear the same stage 10 times! Same rule as the first one, you have to play a bit before dying, otherwise it won't count.
  
  

Fail to clear a stage totally for 20 times. You will get this one eventually. Same rule as "Fall Down Again Where You Have Fell Down", where you can't just enter a stage and die without playing.

If you thought the "C" achivement was annoying, behold! On this achivement you need to get D rank a total of 10 times! (Never thought this would be an achivement tbh lol)

Just pick an easy stage with Maid Marija or Zombie Boru and a healing pet, and try avoiding all beats. As long as you get Accuracy below 50% you are going to get a D.

This one is a fun one, fail to clear a level 7+ song by exhausting at the last note. Pick any level 7 song and just get hit, stay at low HP and get hit on the last note, that's the easiest way to do it!

This is a painful one if you got it without even trying. Get 1 miss judgement in a Level 7+ song!

If you haven't gotten it by now, congrats! It is really painful to miss a Full Combo for just 1 miss.

Something like this~

This one can be tricky, you gotta get all perfects up until the end, and then get a great on the last note of a level 7+ song!

I recommend playing on a song that you can AP easily, you just gotta mess up at the last note intentionally~

This one has 2 achivements as well!

• On this one you gotta get an All Perfect (100% accuracy) on a level 7+ song!
  
  Spring Carnival Master is a good and easy Level 7 to get this achivement on! Alternatively you can do it on Star Driver hard!
  
  
  
• Apparently there is also an achivement for getting a 100% accuracy on a level 10+ song. (Yikes)
  
  This is by far one of the hardest hidden Achivements in the game.
  
  (Screenshot courtesy from Qbicfeet)

Although this one is unclear how it's unlocked, it's description says "Finish all stage achivements in Default Music". I got it while missing some stage achivements on the Default Music, so my guess is that it also counts the DLC's stage achivements. Just clear as much Stage Achivements as you can!

Can you believe it? There is more achivements for failing stages!

For the All Defeated hidden achivement you are required to fail any stage with all the characters (Excluding Sleepwalker Rin). Similar to the other "Fail" achivements, you are required to play a bit of the song before actually failing it, so if you enter a stage and immediately die it won't count!



As for the final hidden achivement I hope we have Invincible! You get this achivement once you have all the rest of the achivements unlocked. On my personal experience you only need to unlock the first stage of the achivement, meaning you will still get this achivement even if you are missing let's say for example "Pinnacle of Life Lv10".

...or is it? I really wonder if there is more achivements left. If they add new ones in the future I will make sure to update this guide! For now a big thanks the all the people that helped me make this guide, and keep following the rhythm in your heart!

Have this cute Buro!