Technology tree

There are 28 technologies in five branches: Military, Economy, Naval, Construction and Culture. Each branch is researched in order, some techs also need one from another branch, and you can research in every branch at the same time.

Cost and research time

A technology costs its base cost + 5 × (cities you own ÷ (units you own + 1)) stars. Owning more units makes research cheaper; owning more cities makes it more expensive. Base cost by tier: tier 1 = 5, tier 2 = 8, tier 3 = 12, tier 4 = 17, tier 5 = 23, tier 6 = 30, tier 7 = 38, tier 8 = 47. Tiers 1-2 take 1 turn to research, tiers 3-5 take 2 turns, and higher tiers 3 turns. Every finished technology is worth +150 score.

Military

Technology	Tier	Base cost ★	Turns	Requires	Unlocks	Starting tech of
Organized Warfare	1	5	1	—	Unit: Defender	Deeproot Wardens, Frostguard
Archery	2	8	1	Organized Warfare	Unit: Archer	Canopy Hunters, Mireheart
Horsemanship	3	12	2	Archery	Unit: Rider	Steppe Riders
Smithing	4	17	2	Horsemanship, Mining	Unit: Swordsman	Ironfrost
Siege Engineering	5	23	2	Smithing, Masonry	Unit: Catapult	Bogforge
Chivalry	6	30	3	Siege Engineering	Unit: Knight	Sunfield Knights

Economy

Technology	Tier	Base cost ★	Turns	Requires	Unlocks	Starting tech of
Agriculture	1	5	1	—	Building: Farm
Forestry	2	8	1	Agriculture	Building: Lumber Mill
Mining	3	12	2	Forestry	Building: Mine
Animal Husbandry	4	17	2	Mining	Building: Ranch Pasture
Trade	5	23	2	Animal Husbandry, Sailing	Building: Beacon

Naval

Technology	Tier	Base cost ★	Turns	Requires	Unlocks	Starting tech of
Sailing	1	5	1	—	Unit: Scout Boat	Tideborn
Shipbuilding	2	8	1	Sailing, Forestry	Unit: Galley	Saltforge Mariners
Ballistics	3	12	2	Shipbuilding	Unit: Ballista Ship
Ramming Tactics	4	17	2	Ballistics	Unit: Ramming Ship
Naval Engineering	5	23	2	Ramming Tactics, Engineering	Unit: War Galleon
Aquaculture	6	30	3	Naval Engineering	Building: Kelp Farm
Carriers	6	30	3	Naval Engineering	Unit: Carrier
Drilling	7	38	3	Aquaculture, Mining	Building: Oil Rig
Fishing Trade	8	47	3	Drilling	Building: Fishing Dock

Construction

Technology	Tier	Base cost ★	Turns	Requires	Unlocks	Starting tech of
Masonry	1	5	1	—	Reduces building costs by 20%
Roads	2	8	1	Masonry	Building: Road Reduces movement cost on tiles with roads built
Fortifications	3	12	2	Roads	Building: City Walls
Engineering	4	17	2	Fortifications	Building: Bridge Unlocks Bridges - a road across one water tile between two shores

Culture

Technology	Tier	Base cost ★	Turns	Requires	Unlocks	Starting tech of
Spirituality	1	5	1	—	Building: Temple
Mountain Worship	2	8	1	Spirituality, Mining	Building: Mountain Temple
Sea Worship	3	12	2	Mountain Worship, Sailing	Building: Water Temple
Ascendance	4	17	2	Sea Worship	Building: Great Temple