Here is the full list of all 38 Meltys Quest achievements.
Defeat D.M.U. on True Princess mode without retreating during the fight.
See all six endings.
Get the Pure Ending while in Princess Mode.
Have exactly 7 in all three cream related experiences.
Defeat the secret boss on True Princess Mode.
View the hidden ending.
Let Dark Pietra defeat herself.
Defeat Dark Globbers while only using Love Shot or Love Wave to do damage.
Defeat Dark Lilf while wearing an Apron.
Mano a Mano Defeat Dark Limey using only Strike skills, Guard or Items.
Defeat the final boss on True Princess Mode.
Obtain the sword of a king.
Pointless, useless, futile, meaningless.
Meet the wandering swordsman while having done the oldest profession in the game five times or more.
Face the first boss of True Princess Mode.
Got Milk?
Oh hey, didn't see you there.
Defeat the final boss while only using Love Shot or Love Wave to do damage to the final boss.
Complete the rebuild of Castle Rothstein.
Learn a Skill from using an Item.
Give life twenty times.
Obtain the secret outfit.
Wear the JK Clothes.
Slay a relic of the past.
Save the world.
Wear only what you were born with.
Time to kick some butt!
Achieve bliss a total of 100 times or more.
Wear Melty's new favorite battle outfit.
Pick the fourth option while talking to Zanelli.
Read Garnet's letter.
Defeat a chicken. Wow.
Help someone prepare for their graduation.
Cannonball!!
Mine an iron ore.
Wear the Nurse Uniform.
You lost on purpose didn't you.
Give the Red Potion to Rudolf.