Tech tree: Metallurgy
Five research branches.
Progression
Metallurgy holds 45 technologies over 15 columns. Researching all of it costs 3,680 red, 330 green and 340 blue tech points. 2 reputation gates sit in this branch. The tab opens on waking up at home in the intro.
Red tech points
Green tech points
Blue tech points
5
10
10
Tier 1
Tier 2
Column 2
Unlocks Bronze Ingot, Bronze Nails, Furnace I and Firewood shed I.
Unlocks:
Requires: Bronze Works
Tier 3
Column 3
Unlocks Bronze Detail and Hardening Bucket.
Unlocks:
Requires: Bronze Melting
Tier 4
Column 4
Unlocks Bronze Axe and Bronze Pickaxe.
Unlocks:
Requires: Bronze Craft
Column 4
Unlocks Bronze Shovel and Bronze Hammer.
Unlocks:
Requires: Bronze Craft
Column 4
Unlocks Alchemy Flasks I and Empty Bottle.
Unlocks:
Requires: Glass
Tier 5
HerbertReputation
20 reputation
Opens once the research before it is done and the reputation with Herbert reaches 20.
Requires: Bronze Forge
Column 5
Unlocks Polished Bronze, Bronze tools and Copper Trinkets.
Unlocks:
Requires: Bronze Forge
Column 5
Unlocks Firewood shed II.
Unlocks:
Requires: Bronze Forge
Tier 6
Column 6
Unlocks Iron Ingot, Supply: Iron and Furnace II.
Unlocks:
Requires: Bronze Polishing
Tier 7
Column 7
Unlocks Barricade I, Spiked Barricade I and Fortified Barricade I.
Unlocks:
Requires: Reinforced Plank
Column 7
Unlocks Light Pike and Reinforced Bow.
Unlocks:
Requires: Bronze Equipment
Column 7
Unlocks Bronze Gear, Iron Nails and Iron Anvil.
Unlocks:
Requires: Iron Forge
Tier 8
Column 8
Unlocks Archer Tower I and Expand Military Building Area.
Unlocks:
Requires: Simple Barricades
Zombie DiggingHidden
Column 8
Unlocks Clay Digger Stand, Sand Digger Stand and Porter Station.
Unlocks:
Requires: Iron Smithing
Zombie MiningHidden
Column 8
Unlocks Zombie Miner and Porter Station.
Unlocks:
Requires: Iron Smithing
Column 8
Unlocks Brick, Glass and Smithy I.
Unlocks:
Requires: Iron Smithing
Tier 9
Column 9
Unlocks Iron Axe and Iron Shovel.
Unlocks:
Requires: Iron Works
Column 9
Unlocks Iron Hammer and Iron Pickaxe.
Unlocks:
Requires: Iron Works
Column 9
Unlocks Iron Ingot, Iron Kit I and Smithy: Hammer.
Unlocks:
Requires: Smithy I
Tier 10
Column 10
Unlocks Barricade II, Spiked Barricade II and Fortified Barricade II.
Unlocks:
Requires: Reinforced Beam
Column 10
Unlocks Battle Pike and Battle Bow.
Unlocks:
Requires: Iron Equipment
Column 10
Unlocks Advanced Detail and Iron tools.
Unlocks:
Requires: Iron Instruments I, Iron Instruments II
Column 10
Unlocks Zombie Carousel.
Unlocks:
Requires: Smithy: Hammer
Column 10
Unlocks Tableware, Glass Containers and Smithy: Bellows.
Unlocks:
Requires: Smithy: Hammer
Tier 11
Column 11
Unlocks Archer Tower II.
Unlocks:
Requires: Robust Barricades
JackReputation
70 reputation
Opens once the research before it is done and the reputation with Jack reaches 70.
Requires: Iron Products
Tier 12
Column 12
Unlocks Steel Detail, Steel Screws, Steel Anvil and Lantern II.
Unlocks:
Requires: Jack
Tier 13
Column 13
Unlocks Barricade III, Spiked Barricade III and Fortified Barricade III.
Unlocks:
Requires: Steel Smithing
Column 13
Unlocks Steel Hammer and Steel Axe.
Unlocks:
Requires: Steel Smithing
Column 13
Unlocks Steel Pickaxe and Steel Shovel.
Unlocks:
Requires: Steel Smithing
Column 13
Unlocks Engineering Details, Steel tools and Casting Table.
Unlocks:
Requires: Steel Smithing
Tier 14
Column 14
Unlocks Archer Tower III.
Unlocks:
Requires: Reinforced Barricades
Column 14
Unlocks Knight's Spear and Heavy Bow.
Unlocks:
Requires: Steel Instruments I
Column 14
Unlocks Steel Armor and Steel Sword.
Unlocks:
Requires: Steel Instruments II
Column 14
Unlocks Clay Molds, Iron Kit II and Smithy II.
Unlocks:
Requires: Steel Casting
Tier 15
Column 15
Unlocks Master Sword and Master Armor.
Unlocks:
Requires: Steel Equipment
Column 15
Unlocks Lens and Smithy: Press.
Unlocks:
Requires: Smithy II
Column 15
Unlocks Engineering Kit, Supply: Steel Tools and Smithy: Grindstone.
Unlocks:
Requires: Smithy II
How it works
Building, Metallurgy and Farming open on waking up at home in the intro; Theology opens during the quest Holy Moly!; Anatomy and Alchemy opens on placing the first body on the autopsy table. Each technology costs red, green and blue tech points, earned by gathering, crafting, using certain items and studying new items at the Study Table, and needs every technology connected to it on its left. The Cooking tab is not researched: its 20 dish groups unlock for free.
Hand-crafting skill and working with materials.
Knowledge of nature and of the nature of things.
Spiritual knowledge of the immaterial world.
A character's portrait in the tree: it opens once the reputation with that character reaches the value shown and every technology linked before it is researched.