Here is the full list of all 20 Twilight Memoria achievements.
Lose The Battle Tutorial
Craft your first item with alchemy
Learn how to gather materials
Complete Chapter 1
Complete Chapter 2
Complete Chapter 3
Complete Chapter 4
Complete Chapter 5
Complete Chapter 6
Complete Chapter 7
Win againts Wolf in the tutorial
Make 100 items with alchemy
Make 500 items with alchemy
Make 1000 items with alchemy
Modify Item's element level 50 times
Modify Item's element level 500 times
Modify Item's element level 1000 times
Fight 50 battles
Fight 200 battles
Fight 500 battles