Metallurgy

Plan your technology points

This branch contains 45 purchasable technologies and two reputation gates. Buying every technology costs 3,680 red, 330 green and 340 blue points. Unlock only the next production or defense step you need rather than saving for the entire tree.

Bronze Nails

Bronze Ingot

Iron Ingot

Early branches of the Metallurgy technology tree

Complete technology list

The table includes both reputation gates. Their zero point cost does not remove the requirement: progress with Herbert or Jack until the displayed reputation threshold is met. Bronze Works costs 5 red points.

Technology	Prerequisite	Red	Green	Blue	Unlock
Bronze Works		5	0	0	Bronze Nails Wooden Anvil
Bronze Melting	Bronze Works	10	0	0	Bronze Ingot Furnace I Firewood shed I
Glass	Bronze Melting	30	10	0	Glass
Bronze Craft	Bronze Melting	30	0	0	Bronze Detail Hardening Bucket
Bronze Forge	Bronze Craft	20	0	0	Tin Golden nugget Bronze Ingot Sluice Box
Bronze Blades	Bronze Craft	15	5	0	Bronze Axe Bronze Pickaxe
Bronze Instruments	Bronze Craft	15	5	0	Bronze Shovel Bronze Hammer
Glass Blowing	Glass	45	10	0	Alchemy Flasks I Empty Bottle
Herbert 20	Bronze Forge	0	0	0
Bronze Polishing	Bronze Forge	30	0	0	Polished Bronze Bronze tools Copper Trinkets
Firewood shed II	Bronze Forge	20	5	0	Firewood shed II
Reinforced Plank	Herbert 20	45	0	0	Reinforced Plank
Bronze Equipment	Herbert 20	30	0	0	Bronze Armor Bronze Sword
Iron Forge	Bronze Polishing	35	0	0	Iron Ingot Supply: Iron Furnace II
Simple Barricades	Reinforced Plank	60	25	0	Barricade I Spiked Barricade I Fortified Barricade I
Bronze Weapons	Bronze Equipment	35	10	0	Light Pike Reinforced Bow
Iron Smithing	Iron Forge	50	0	0	Bronze Gear Iron Nails Iron Anvil
Bellows	Iron Forge	30	0	0	Lens Alchemy Flasks II Bellows
Archers Tower	Simple Barricades	60	25	0	Archer Tower I
Zombie Digging	Iron Smithing	50	0	10	Clay Digger Stand Sand Digger Stand Porter Station
Iron Works	Iron Smithing	75	0	0	Iron Detail Iron Kit I
Zombie Mining	Iron Smithing	60	0	10	Zombie Miner Porter Station
Smithy I	Iron Smithing	75	0	20	Brick Glass Smithy I
Reinforced Beam	Iron Works	75	0	0	Reinforced Beam
Iron Equipment	Iron Works	80	0	0	Iron Armor Iron Sword
Iron Instruments I	Iron Works	80	0	15	Iron Axe Iron Shovel
Iron Instruments II	Iron Works	80	0	15	Iron Hammer Iron Pickaxe
Smithy: Hammer	Smithy I	80	0	30	Iron Ingot Iron Kit I Smithy: Hammer
Robust Barricades	Reinforced Beam	90	30	0	Barricade II Spiked Barricade II Fortified Barricade II
Iron Weapons	Iron Equipment	90	0	10	Battle Pike Battle Bow
Iron Products	Iron Instruments I Iron Instruments II	90	0	10	Advanced Detail Iron tools
Zombie Gears	Smithy: Hammer	90	0	20	Zombie Carousel
Smithy: Bellows	Smithy: Hammer	90	0	20	Tableware Glass Containers Smithy: Bellows
Archers Tower II	Robust Barricades	100	50	0	Archer Tower II
Jack 70	Iron Products	0	0	0
Steel Smithing	Jack 70	120	0	15	Steel Detail Steel Screws Steel Anvil
Reinforced Barricades	Steel Smithing	150	75	0	Barricade III Spiked Barricade III Fortified Barricade III
Steel Instruments I	Steel Smithing	150	0	20	Steel Hammer Steel Axe
Steel Instruments II	Steel Smithing	150	0	20	Steel Pickaxe Steel Shovel
Steel Casting	Steel Smithing	150	0	20	Engineering Details Steel tools Casting Table
Archers Tower III	Reinforced Barricades	160	80	0	Archer Tower III
Steel Weapons	Steel Instruments I	160	0	10	Knight's Spear Heavy Bow
Steel Equipment	Steel Instruments II	160	0	10	Steel Armor Steel Sword
Smithy II	Steel Casting	160	0	20	Clay Molds Iron Kit II Smithy II
Steel Works	Smithy II	175	0	20	Engineering Kit Supply: Steel Tools Smithy: Grindstone
Lenses	Smithy II	175	0	20	Lens Smithy: Press
Masterwork Equipment	Steel Equipment	200	0	25	Master Sword Master Armor

Turn research into production

Herbert

Jack

1. Buy the prerequisites shown in the table, then the desired technology.
2. Build its workstation and supply materials. Research unlocks the blueprint; it does not build or stock the station.
3. If a recipe remains blocked, check equipment and mastery. Simple Barricades also requires construction in the correct area.