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