Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Towering Achievement	Complete every optional defense level on any difficulty.
Architecture Degree	Acquire all Citadel upgrades from the Book of Insight.
Berserker	Complete all skirmish levels on Extreme difficulty.
Brickie	Place 150 stone pieces.
Bug Squasher	Kill 100 horrors during campaign.
Butcher, Baker, Candlestick Maker...	Complete a city-building level with at least one building of each type.
Creator	Create and save a level in Sandbox Mode.
Crush Hour	Kill 50 horrors under collapsing pieces.
ECHO, Echo, echo....	Summon 15 echoes during a level.
Fate Is A Dark Comedy	Complete 'the Defense of Hogar' on any difficulty.
Feathered Friend	Pet Hermes 10 times.
Fight Swarm With Swarm	Have 75 units at your command during a city-building level.
Following A Lost Trail...	Complete 'Lost Pages' on any difficulty.
Foreman	Place 1000 stone pieces.
Goddess	Complete all campaign levels on Extreme difficulty.
Home Is Calling	Complete the opening level on any difficulty.
Horror Of Horrors	Complete 'Downpour' on any difficulty.
I Can See My Shack From Up Here!	Deploy a unit 25m from the ground.
La La La Can't Hear You	Kill 5 Sirenas during campaign.
Legend	Complete all campaign levels on Hard difficulty.
Lost And Found	Discover all lost pages from Aura's expedition
Lost Words	Discover a lost page from an ill-fated expedition
Master Architect	Place 5000 stone pieces.
Metropolis	Reach maximum Prosperity in a city-building level.
Party Of Misfits	Create a squad of Hogardian units with at least one unit of each type.
Professional Exterminator	Kill 10000 horrors during campaign.
Rat Catcher	Kill 1000 horrors during campaign.
Rectora	Earn the highest Expedition rank during campaign.
Reunited	Complete 'Into the Depths' on any difficulty.
Revivalist	Witness Iris return to the Citadel from the brink of death.
Self Improvement	Acquire all skills for Iris from the Book of Insight.
Skim Reading	Acquire one skill for Iris and one upgrade for the Citadel using the Book of Insight.
Skirmisher	Complete all skirmish levels on any difficulty.
Speed Builder	Complete the campaign in less than eight hours on any difficulty.
Tell Stories Of This Day	Complete the final level on any difficulty.
The Order A-Fails	Lose any level during campaign.
The Order A-Wails	Lose a soldier to a fall into the Depths.
The Rectora's Secret	Complete 'Memorial' on any difficulty.
Tower Defender	Complete an optional defense level on any difficulty.
Untouchable	Complete a city-building level on Hard without losing any units.
We Will Rebuild	Complete 'the Forest Garrison' on any difficulty.
Where There's A Will...	Find a familiar backpack...
Wood You Kindly	Complete an optional defense level on Medium or higher without using Stone pieces.
You Can Pause, Y'Know	Complete a city-building level without pausing.