Here is the full list of all 12 Lowglow achievements.
Complete the fourth chapter
Complete the third chapter
Complete the second chapter.
Complete the first chapter.
Complete 5 levels with less lines than the given amount
Complete a level without missing a single drop.
Complete the fifth 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!
Destroy 50 lines.