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