Here is the full list of all 21 Pocket Mirror ~ GoldenerTraum achievements.
Reach Normal End No. 3 ~ Little Goody Two Shoes.
Reach Normal End No. 2 ~ Dawn.
Meet every pumpkin.
Acquire all Regalias.
Reach Secret End No. 4 ~ Shattered Delusions.
Reach ??? Ending ~ Witching Hour.
Acquire all pumpkin charms.
Find Henri's hidden room in New Game+.
Reach Normal End No. 1 ~ Platinum.
Get the dead end in Lisette's Midnight Circus.
Read all parts of the Liebesbrief.
Get the dead end in Lisette's Cereberus.
Find Egliette's secret room in Sugary Supper.
Gather and listen to all wax records.
Get the dead end in Harpae's Nuit.
Reach Bad End No. 2 ~ Blindness.
Get the dead end in Harpae's Secret Manor.
Reach Bad End No. 1 ~ Porcelain.
Get the dead end in Fleta's Dollhouse.
Get the dead end in Sugary Supper.
Get the dead end in Unknown Corridor.