Economy

Forestry

Age I

Woodcutting Technology

Double the rate at which Villagers chop down trees.

Costs
25
50
0:45

Survival Techniques

Age I

Hunting Technology

Increase Villagers' hunted meat gather rate by +15%.

Costs
25
75
0:25

Wheelbarrow

Age I

Villager Technology

Increase the carry capacity of Villagers by +5 and their movement speed by +15%.

Costs
50
150
1:30

Double Broadax

Age II

Wood Gathering Technology 1/3

Increase Villagers' gathering rate for Wood by 15%.

Costs
50
100
0:45

Extended Lines

Age II

Fishing Technology 1/2

Increase the gathering rate of Fishing Ships by +15% and carry capacity by +10.

Costs
75
175
0:30

Professional Scouts

Age II

Hunting Technology

Scouts gain the ability to carry animal carcasses and +100% damage against wild animals. Scouts move -35% slower while carrying and cannot pick up Boar.

Costs
100
275
1:15

Specialized Pick

Age II

Mining Technology 1/3

Increase Villagers' gathering rate for Gold and Stone by 15%.

Costs
50
100
0:45

Textiles

Age II

Villager Technology

Increase Villagers' health by +50%.

Costs
50
100
0:20

Horticulture

Age II

Food Gathering Technology 1/3

Increase Villagers' gathering rate for Food by 10%. Does not apply to hunted meat.

Costs
50
100
0:45

Drift Nets

Age III

Fishing Technology 2/2

Increase the gathering rate of Fishing Ships by +10%, carry capacity by +20 and move speed by +10%.

Costs
150
350
0:45

Lumber Preservation

Age III

Wood Gathering Technology 2/3

Increase Villagers' gathering rate for Wood by 15%.

Costs
100
250
1:00

Shaft Mining

Age III

Mining Technology 2/3

Increase Villagers' gathering rate for Gold and Stone by 15%.

Costs
100
250
1:00

Fertilization

Age III

Food Gathering Technology 2/3

Increase Villagers' gathering rate for Food by 10%. Does not apply to hunted meat.

Costs
100
250
1:00

Crosscut Saw

Age IV

Wood Gathering Technology 3/3

Increase Villagers' gathering rate for Wood by 15% and Wood gatherers carry capacity by +5.

Costs
250
500
1:15

Cupellation

Age IV

Mining Technology 3/3

Gold gatherers drop off 15% more resources.

Costs
250
500
1:15

Precision Cross-Breeding

Age IV

Food Gathering Technology 3/3

Increase Villagers' gathering rate for Food by 10%. Does not apply to hunted meat.

Costs
250
500
1:15

Naval

Naval Arrowslits

Age II

Naval Technology

Add a defensive arrowslit to this Dock which only attacks ships.

Costs
75
125
0:30

Armored Hull

Age III

Naval Technology 1/2

Increase the health of all military ships by +20% and ranged armor by +1.

Costs
150
350
0:30

Extra Hammocks

Age III

Naval Technology

Increases the number of arrows fired by Archer Ships by +1.

Costs
100
250
0:30

Heavy Dromon

Age III

Naval Technology

Upgrade all Dromons to leave Greek Fire on the surface or ground where they attack. Man The Sails cooldown also reduced to 20 seconds.

Costs
100
250
0:30
Unique to Byzantines

Liquid Explosives

Age III

Naval Technology

Incendiary Ships deal full damage to all enemies in their explosion radius.

Costs
100
250
0:30
Unique to Byzantines

Explosives

Age IV

Naval Technology

Increase the damage of Incendiary Ships by +40%.

Costs
150
350
0:45

Heated Shot

Age IV

Naval Technology

Archer Ship arrows light enemy Ships on fire, dealing damage over time.

Costs
200
500
0:45

Shipwrights

Age IV

Naval Technology 2/2

Increase the health of all military ships by +20% and ranged armor by +1.

Costs
300
550
0:50

Defensive

Arrowslits

Age II

Weapon Emplacement

Add defensive arrowslits to this structure and increase garrison arrow range by +1. Only one weapon emplacement can be added.

Costs
25
50
0:30

Fortify Outpost

Age II

Defensive Emplacement

Add +1000 health and +5 fire armor to this Outpost.

Costs
100
0:30

Border Settlements

Age II

Building Technology

Increase House line of sight by 7 tiles and improve their construction speed by 500%.

Costs
40
80
0:20
Unique to Byzantines

Boiling Oil

Age III

Defensive Technology

Towers and Keeps gain a boiling oil attack against nearby units that deals 30 damage.

Costs
500
200
1:30

Mangonel Emplacement

Age III

Weapon Emplacement

Add a defensive mangonel emplacement to this structure.

Costs
75
200
0:30
Unique to Byzantines

Court Architects

Age IV

Building Technology

Patronage of the finest builders increases all building health by +30%.

Costs
700
300
1:30

Cannon Emplacement

Age IV

Weapon Emplacement

Add a defensive cannon emplacement to this structure.

Costs
125
375
1:00

Religious

Herbal Medicine

Age III

Healing Technology

Increase the healing rate of religious units by +60%.

Costs
275
0:45

Piety

Age IV

Religious Technology

Increase the health of religious units by +40.

Costs
325
0:45

Tithe Barns

Age IV

Religious Technology

Relics placed in a Monastery provide an income of +40 Food, +40 Wood, and +10 Stone every minute.

Costs
500
1:00

Military

Fitted Leatherwork

Age II

Melee Armor Technology 1/3

Increase the melee armor of all non-siege units by +1.

Costs
50
125
1:00

Iron Undermesh

Age II

Ranged Armor Technology 1/3

Increase the ranged armor of all non-siege units by +1.

Costs
50
125
1:00

Steeled Arrow

Age II

Ranged Damage Technology 1/3

Increase the ranged damage of all arrows and bolts by +1.

Costs
50
125
1:00

Bloomery

Age II

Melee Damage Technology 1/3

Increase the melee damage of all non-siege units by +1.

Costs
50
125
1:00

Siege Engineering

Age II

Siege Unit Unlock

Melee and ranged infantry can construct Siege Towers and Battering Rams in the field.

Costs
50
125
0:30

Expilatores

Age II

Cavalry Technology

Horseman damage vs. Workers increased by +2. Workers killed by your Horsemen reward +20 Gold.

Costs
30
50
0:20
Unique to Byzantines

Trapezites

Age II

Cavalry Technology

Scouts enhance the torch damage of nearby units by 25%

Costs
30
50
0:20
Unique to Byzantines

Balanced Projectiles

Age III

Ranged Damage Technology 2/3

Increase the ranged damage of all arrows and bolts by +1.

Costs
100
250
1:00

Greased Axles

Age III

Siege Technology

Increase the movement speed of siege engines by +15%.

Costs
150
350
1:00

Insulated Helm

Age III

Melee Armor Technology 2/3

Increase the melee armor of all non-siege units by +1.

Costs
100
250
1:00

Wedge Rivets

Age III

Ranged Armor Technology 2/3

Increase the ranged armor of all non-siege units by +1.

Costs
100
250
1:00

Decarbonization

Age III

Melee Damage Technology 2/3

Increase the melee damage of all non-siege units by +1.

Costs
100
250
1:00

Military Academy

Age III

Production Technology

Increase the production speed of infantry, cavalry, siege, and transport units at buildings by 33%. Does not affect religious units or other support units.

Costs
100
250
1:00

Angled Surfaces

Age IV

Ranged Armor Technology 3/3

Increase the ranged armor of all non-siege units by +1.

Costs
150
350
1:00

Chemistry

Age IV

Gunpowder Technology

Advancements in alchemical research increase the bonus damage of all gunpowder siege weapons by +25%.

Costs
200
650
1:00

Master Smiths

Age IV

Melee Armor Technology 3/3

Increase the melee armor of all non-siege units by +1.

Costs
150
350
1:00

Platecutter Point

Age IV

Ranged Damage Technology 3/3

Increase the ranged damage of all arrows and bolts by +1.

Costs
150
350
1:00

Siege Works

Age IV

Siege Technology

New carpentry techniques increase the health of siege units by +20%.

Costs
300
600
1:30

Damascus Steel

Age IV

Melee Damage Technology 3/3

Increase the melee damage of all non-siege units by +1.

Costs
150
350
1:00

Elite Army Tactics

Age IV

Melee Infantry Technology

Training elite infantry leads to improved prowess in battle. Melee Infantry gain +15% damage and +15% health.

Costs
500
1000
1:30

Incendiary Arrows

Age IV

Ranged Technology

Flammable munitions grant non-gunpowder ranged units a siege arrow or bolt when attacking buildings and increase their damage by +20%.

Costs
500
1000
1:30

Serpentine Powder

Age IV

Gunpowder Technology

With new gunpowder, Handcannoneers gain +5 damage against melee infantry and gain a brief increase to their movement speed after firing their weapon.

Costs
300
500
1:00

Greek Fire Projectiles

Age IV

Siege Technology

Counterweight Trebuchets deal +30% increased damage and engulf their target with Greek Fire, dealing area damage. Greek Fire does not stack with other patches.

Costs
100
250
1:00
Unique to Byzantines

Numeri

Age IV

Cavalry Technology

Enemy units hit by Trample become vulnerable and receive +15% increased damage for 12 seconds.

Costs
150
350
1:00
Unique to Byzantines

Units

Eastern Mercenary Contract

Age I

Mercenary Contract

Unlocks production of Keshik, Ghulam, and Tower Elephant mercenaries. Keshik: Feudal Age Ghulam: Veteran contract Tower Elephant: Elite contract

Costs
0:10
Unique to Byzantines

Silk Road Mercenary Contract

Age I

Mercenary Contract

Unlocks production of Javelin Thrower, Camel Rider, and Grenadier mercenaries. Javelin Thrower: Feudal Age Camel Rider: Veteran contract Grenadier: Elite contract

Costs
0:10
Unique to Byzantines

Western Mercenary Contract

Age I

Mercenary Contract

Unlocks production of Longbowman, Landsknecht, and Streltsy mercenaries. Longbowman: Feudal Age Landsknecht: Veteran contract Streltsy: Elite contract

Costs
0:10
Unique to Byzantines

Teardrop Shields

Age III

Heavy Armor Technology

Increase the armor of Cataphracts by +1, move speed of Limitanei by +15%, and attack speed of Varangian Guard by +15%.

Costs
100
250
1:00
Unique to Byzantines

Veteran Contract

Age III

Unit Technology 2/3

Upgrade Hardened Mercenaries to Veteran Mercenaries.

Costs
50
125
0:30
Unique to Byzantines

Lightweight Beams

Age IV

Battering Ram Technology

Increase Battering Ram attack speed by +20% and reduce their field construction time by -50%.

Costs
300
400
1:00

Roller Shutter Triggers

Age IV

Springald Technology

Increases Springald attack speed by +25% and grants +10% Ranged Resistance.

Costs
150
350
1:00

Spyglass

Age IV

Scout Technology

Increase the sight radius of Scouts by 30%.

Costs
100
50
0:45

Silk Bowstrings

Age IV

Archer Technology

Stringing bows with silk grants Archers +1.5 range and Mounted Archers +0.75 range.

Costs
300
700
1:00

Adjustable Crossbars

Age IV

Mangonel Technology

Increases Mangonel range by +1, blast radius by +75%, and adds +1 projectile to attacks.

Costs
1000
1200
1:30

Biology

Age IV

Lancer Technology

Investing in natural sciences increases the health of all cavalry by +25%.

Costs
500
1000
1:30

Elite Contract

Age IV

Unit Technology 3/3

Upgrade Veteran Mercenaries to Elite Mercenaries.

Costs
300
700
1:00
Unique to Byzantines

Ferocious Speed

Age IV

Varangian Guard Technology

Varangian Guard increase their move speed by +30% when activating Berserking.

Costs
100
250
1:00
Unique to Byzantines

Age of Empires IV© Microsoft Corporation. AoE4World.com was created under Microsoft's "Game Content Usage Rules" using assets from Age of Empires IV , and it is not endorsed by or affiliated with Microsoft.