Pieces

A gap made traversable with wood pieces

Stone Bricks changing appearance as Toughness increases

Pieces are constructed instantly and nlike buildings pieces can be constructed anywhere. If you hold and drag with left mouse button pressed you can build multiple pieces in a straight line. A piece can only be placed where it has enough Support from below. If sections providing Support are destroyed or removed the supported pieces may collapse. When time is paused a piece won't collapse without Support and will be highlighted red.

You can recycle placed pieces by pressing the recycle button below the build menu and then clicking on the buildings you want recycled.

Pieces may be placed in two ways depending on the current mission.

• On City Building missions pieces are constructed with resources like buildings.
• On Expedition missions pieces must be obtained from caches on the map and may only be built in a limited number.

Pieces made primarily of Stone have a Toughness rating. If there are enough other pieces made primarily of stone underneath or above them their Toughness will upgrade, visibly changing the appearance of the entire column of pieces. Pieces gain x10 health if there are 3 pieces above/below them and x25 health if there are 6 pieces above/below them. Pieces that are in danger of breaking will glow red.

Wood and Stone Pieces

Wood Pieces require less Support but their health is minimal. Their purpose is in aiding travel, either across caps or to reach the top of Stone Pieces. Wood Pieces do not require any level of Prosperity to be constructed but some must be unlocked with skills from the Book of Insight.

Stone Pieces have more health and gain Toughness but require more Support. Stone Pieces do not require any level of Prosperity to be constructed but some must be unlocked with skills from the Book of Insight.

Advanced Pieces

Doors

Doors are available from the start and allow units to pass through walls. They allow other buildings to be constructed above them.

Door	Effect	Health	Cost
Door	Allows only human units to pass	6	15 Stone 24 Wood 4 Minerals
Double Door	Allows only human units to pass	8	25 Stone 36 Wood 6 Minerals
Arch Doorway (1x1)	Allows all units to pass	2	6 Stone
Arch Doorway (1x2)	Allows all units to pass	3	12 Stone

Windows

Windows are unlocked at Prosperity level II and boost the range of units behind it. They allow other buildings to be constructed above them.

Window	Health	Cost
Window	2	8 Stone
Wide Window	3	12 Stone
Corner Window	2	8 Stone

Roofs

Roofs are unlocked starting with chapter 8 when rain becomes present and will give units shelter from the rain. All of them cost 1 Wood.

Tactical Pieces

General Boosts

General Boosts provide benefits to nearby defenses or units next to them.

Tactical Piece	Effect	Health	Cost	Prosperity Level
Merlon	Boosts the range of any unit behind it Upgrades the Toughness of stone pieces below it	Scales with wall	6 Stone	I
Merlon (interior corner)	Boosts the range of any unit behind it Upgrades the Toughness of stone pieces below it	Scales with wall	15 Stone	I
Merlon (exterior corner)	Boosts the range of any unit behind it Upgrades the Toughness of stone pieces below it	Scales with wall	6 Stone	I
Banner	Increases attack damage of adjacent units by 25%.	1	12 Stone 10 Minerals	I
Tactician's Nook	Reduces the cooldown of special skills Must be placed on a wall	Scales with wall	25 Stone 25 Minerals 2 Mistfuel	IV
Grand Banner	Increases attack damage of adjacent units by 50%.	1	12 Stone 10 Minerals	IV

Traps

Traps can be set up to damage approaching horrors but lose health in the process. Unlike other buildings recycling them does not refund resources.

Trap	Effect	Health	Cost	Prosperity Level
Spikes	Deals damage to any horror walking through it	30	15 Wood	I
Reinforced Spikes	Deals high damage to any horror walking through it	60	30 Wood 20 Oxygen 2 Minerals	III
Decoy	Attracts nearby horrors and explodes when destroyed, inflicting Burning on all attacking horrors	75	120 Wood 12 Minerals 2 Mistfuel	IV

Specialist Boosts

Specialist Boosts give adjacent units attack bonuses. More compact versions can be unlocked via the Book of Insight.

Specialist Boost	Effect	Cost	Prosperity Level
Fire Arrows	Bowman, Hunter and Partisan attacks cause damage over time Can be upgraded into Hell Arrows for the cost difference	15 Stone 25 Minerals	II
Throwing Poison	Lobber and Captor attacks cause horrors to inflict Slowed and Corroding on nearby horrors when killed Can be upgraded into Hell Poison for the cost difference	15 Stone 25 Minerals	II
Bomber's Spark	Cannoneer and Ballista attacks cause horrors to damage nearby horrors when killed Can be upgraded into Hell Spark for the cost difference	18 Stone 30 Minerals 2 Mistfuel	III
Hell Arrows	Bowman, Hunter and Partisan attacks cause damage over time Can also be upgraded from Fire Arrows for the cost difference	60 Stone 45 Minerals 90 Oxygen	IV
Hell Poison	Lobber and Captor attacks cause horrors to inflict Slowed and Corroding on nearby horrors when killed Can also be upgraded from Throwing Poison for the cost difference	75 Stone 50 Minerals 90 Oxygen	IV
Hell Spark	Cannoneer and Ballista attacks cause horrors to damage nearby horrors when killed Can also be upgraded from Bomber's Spark for the cost difference	81 Stone 58 Minerals 90 Oxygen 2 Mistfuel	IV