Here is the full list of all 12 Lowglow achievements.
Complete 30 levels with less lines than the given amount. Magnificent!
Complete 15 levels with less lines than the given amount.
Destroy 50 lines.
Open all of the vaults in Umbralight
Complete the fifth chapter
Complete 5 levels with less lines than the given amount
Complete the fourth chapter
Open your first vault.
Complete a level without missing a single drop.
Complete the third chapter
Complete the second chapter.
Complete the first chapter.