Upgrading

Some items' or groups' chance to drop changes according to the player's gamestage. Here you can see those values for any gamestage you want using the little box below. Just type the gamestage you want in the box and press the Apply!-button. The values should change immediately, if the chance is different.

Current game stage: 1

Description

Upgrading is a Game Mechanic that describes the process of improving a Block in order to make it stronger. In order to upgrade a Block, one must have the materials needed for the upgrade in the character inventory and have an appropriate Construction Tool equipped. An upgradeable Block is targeted with the crosshairs, and clicking the right mouse-button will initiate the upgrading process.

Appropriate Tools

There are only a handful of tools that can upgrade blocks, some easier to obtain compared to others.

• Stone Axe
• Taza's Stone Axe
• Claw Hammer
• Nailgun

Both stone axes will upgrade 1/3 every use, requiring three uses to completely upgrade a block. Claw hammer upgrades 1/2 every use, requiring two uses to completely upgrade a block.
The nailgun upgrades blocks instantly with a single use. This, however, means that the player should be very careful when repairing blocks with it as they can be accidentally upgraded to a higher level.

Upgrade Materials

These are the different upgrade materials that could be used during the process.

• Wood is the most basic upgrade material. It is used to upgrade Wood Frames and other wooden blocks, traps and furniture.
• Iron is sometimes used as an upgrade material after wood and when upgrading Iron Frames. The upgrades offer a bit higher durability than wooden blocks.
• Forged Iron is used to upgrade especially furniture, such as doors and different traps.
• Cobblestone Rocks are used to upgrade blocks after wood to Cobblestone Blocks. They offer a lot more durability than wooden blocks making them valuable for defending against the zombies.
• Concrete Mix is used to upgrade cobblestone blocks to Concrete Blocks. After successfully upgrading a block with concrete mix, the player must wait for a certain time for the concrete to dry to upgrade it again.
• Forged Steel is the last resource used to upgrade concrete blocks and other furniture, such as doors and hatches.

Upgrade Process

Flowchart indicating the upgrade path of all base building blocks. Arrows indicate whether a block can be upgraded, downgraded or destroyed.

Flowchart indicating the upgrade path of all base building blocks and the resource cost for upgrading them.

Resource Efficiency

This is a table containing the resources needed to upgrade from a craftable block to Steel Blocks. This includes the base cost of the craftable block.
Note: These amounts are for the base crafting, certain perks such as the Advanced Engineering lower the amount of resources needed.

Start From
Wood Frames	10				10	20	10
Scrap Iron Frames		95	4			20	10
Flagstone Blocks					14	20	10
Brick Blocks			12	2		20	10
Rebar Frames		5	0.2			20	10
Wet Concrete Blocks						20	10

In terms of the most basic resources.

Start From
Wood Frames	10	200	20	64
Scrap Iron Frames		295	24	64
Flagstone Blocks		200	34	78
Brick Blocks		200	32	66
Rebar Frames		205	20.1	64
Wet Concrete Blocks		200	20	64

To summarize the tables: Most cost-efficient way of building concrete/steel blocks is through the wet concrete blocks. However, the player has to consider required workstations and crafting time when choosing the block to go with. Upgrading blocks also gives a decent amount of Experience, which should be taken note of as well. Blocks, such as the wet concrete block, also can't be picked up in the event of misplacement and have to be destroyed, whereas frames, such as rebar frames, can be freely picked up after placement.

Wood

This upgrade path starts with Wood Frames as the base block and ends with Steel Blocks.

Wood Frames Upgrade Path
Block	Upgrade Resource	Quantity	Result
Wood Frame	Wood	x4	Wood Block
Wood Block	Wood	x4	Reinforced Wood Block
Reinforced Wood Block	Cobblestone Rocks	x10	Cobblestone Block
Cobblestone Block	Concrete Mix	x10	Concrete Block
Concrete Block	Concrete Mix	x10	Reinforced Concrete Block
Reinforced Concrete Block	Forged Steel	x10	Steel Block

Stone

This upgrade path starts with Flagstone as the base block and ends with steel blocks.

Flagstone Upgrade Path
Block	Upgrade Resource	Quantity	Result
Flagstone Block	Cobblestone Rocks	x10	Cobblestone Block
Cobblestone Block	Concrete Mix	x10	Concrete Block
Concrete Block	Concrete Mix	x10	Reinforced Concrete Block
Reinforced Concrete Block	Forged Steel	x10	Steel Block

Iron

This upgrade path starts with Iron Frames as the base block and ends with steel blocks.

Iron Frame Upgrade Path
Block	Upgrade Resource	Quantity	Result
Scrap Iron Frame	Iron	x40	Scrap Iron Block
Scrap Iron Block	Iron	x40	Reinforced Scrap Iron Block
Reinforced Scrap Iron Block	Concrete Mix	x10	Concrete Block
Concrete Block	Concrete Mix	x10	Reinforced Concrete Block
Reinforced Concrete Block	Forged Steel	x10	Steel Block

Concrete

Concrete has two ways of upgrading blocks to steel blocks. The first upgrade path starts with Rebar Frames as the base block and ends with steel blocks.

Rebar Frame Upgrade Path
Block	Upgrade Resource	Quantity	Result
Rebar Frames	Concrete Mix	x20	Reinforced Concrete Block
Reinforced Concrete Block	Forged Steel	x10	Steel Block

The second upgrade path starts with Wet Concrete Blocks as the base block and ends with steel blocks.

Wet Concrete Upgrade Path
Block	Upgrade Resource	Quantity	Result
Wet Concrete Block	Concrete Mix	x10	Reinforced Concrete Block
Reinforced Concrete Block	Forged Steel	x10	Steel Block

Doors

Secure Wooden Door

This upgrade path starts with a Secure Wooden Door as the base block and ends with Vault Door_v3

Secure Wooden Door Upgrade Path
Block	Upgrade Resource	Quantity	Result
Secure Wooden Door	Wood	x4	Reinforced Secure Wooden Door
Reinforced Secure Wooden Door	Iron	x12	Metal Reinforced Wooden Door
Metal Reinforced Wooden Door	Iron Door	x1	Iron Door
Iron Door	Forged Iron	x10	Iron Door1 v2
Iron Door1 v2	Forged Iron	x10	Iron Door1 v3
Iron Door1 v3	Vault Door	x1	Vault Door
Vault Door	Forged Steel	x12	Vault Door v2
Vault Door v2	Forged Steel	x12	Vault Door v3