Civ VI BBG 7.3 Technology Tree
Ancient Era
Pottery
Animal Husbandry
Mining
Sailing
To Boost: Found a city on the Coast.
Astrology
To Boost: Find a natural wonder.
Irrigation
To Boost: Farm a resource.
Requires: Pottery
Archery
To Boost: Kill a unit with a Slinger.
Requires: Animal Husbandry
Writing
To Boost: Meet another civilization.
Requires: Pottery
Masonry
To Boost: Build a Quarry.
Requires: Mining
Bronze Working
To Boost: Kill 3 Barbarians.
Requires: Mining
Wheel
To Boost: Mine a resource.
Requires: Mining
Classical Era
Celestial Navigation
To Boost: Improve 2 sea resources.
Requires: Sailing, Astrology
Currency
To Boost: Make a 
Trade Route.
Requires: Writing
Horseback Riding
To Boost: Build a Pasture.
Requires: Archery
Iron Working
To Boost: Build an Iron Mine.
Requires: Bronze Working
Shipbuilding
To Boost: Own 2 Galleys.
Requires: Sailing
Mathematics
To Boost: Build 3 different specialty districts.
Requires: Currency
Construction
To Boost: Build a Water Mill.
Requires: Masonry, Horseback Riding
Engineering
To Boost: Build Ancient Walls.
Requires: Wheel
Medieval Era
Military Tactics
To Boost: Kill a unit with a Spearman.
Requires: Mathematics
Apprenticeship
To Boost: Build 3 Mines.
Requires: Currency, Horseback Riding
Machinery
To Boost: Own 3 Archers.
Requires: Iron Working, Engineering
Buttress
To Boost: Build a Classical era or later wonder
Requires: Shipbuilding, Mathematics
Education
To Boost: Earn a Great Scientist.
Requires: Mathematics, Apprenticeship
Stirrups
To Boost: Have the Feudalism civic.
Requires: Horseback Riding, Apprenticeship
Military Engineering
To Boost: Build an Aqueduct.
Requires: Construction
Castles
To Boost: Adopt a government with 6 inherent policy slots.
Requires: Construction
Renaissance Era
Cartography
To Boost: Build 2 Harbors.
Requires: Buttress
Mass Production
To Boost: Build a Lumber Mill.
Requires: Education, Buttress, Military Tactics
Banking
To Boost: Have the Guilds civic.
Requires: Education, Stirrups
Gunpowder
To Boost: Build an Armory.
Requires: Apprenticeship, Stirrups, Military Engineering
Printing
To Boost: Build 2 Universities.
Requires: Machinery
Square Rigging
To Boost: Kill a unit with a Musketman.
Requires: Cartography
Astronomy
To Boost: Build a University adjacent to a Mountain.
Requires: Education
Metal Casting
To Boost: Own 2 Crossbowman.
Requires: Gunpowder
Siege Tactics
To Boost: Own 2 Trebuchets.
Requires: Castles
Industrial Era
Industrialization
To Boost: Build 2 Workshops.
Requires: Square Rigging, Mass Production
Scientific Theory
To Boost: Have The Enlightenment civic.
Requires: Astronomy, Banking
Ballistics
To Boost: Have 2 Forts in your territory. Both constructed by a Military Engineer.
Requires: Metal Casting
Military Science
To Boost: Kill a unit with a Knight.
Requires: Siege Tactics, Printing
Steam Power
To Boost: Build 2 Shipyards.
Requires: Industrialization, Scientific Theory
Sanitation
To Boost: Build 2 Neighborhoods.
Requires: Scientific Theory
Economics
To Boost: Build 2 Banks.
Requires: Scientific Theory, Metal Casting
Rifling
To Boost: Build a Niter Mine.
Requires: Ballistics, Military Science
Modern Era
Flight
To Boost: Build an Industrial era or later wonder.
Requires: Industrialization, Scientific Theory
Replaceable Parts
To Boost: Own 3 Line Infantry.
Requires: Economics
Steel
To Boost: Build Renaissance Walls.
Requires: Rifling
Refining
To Boost: Build 1 Coal Power Plant.
Requires: Rifling
Electricity
To Boost: Own 2 Privateers.
Requires: Steam Power
Radio
To Boost: Build a National Park.
Requires: Steam Power, Flight
Chemistry
To Boost: Have a level 2 Alliance.
Requires: Sanitation, Replaceable Parts
Combustion
To Boost: Extract an Artifact.
Requires: Steel, Refining
Advanced Ballistics
To Boost: Build 1 Oil Power Plant
Requires: Replaceable Parts, Steel
Atomic Era
Advanced Flight
To Boost: Build 2 Biplanes.
Requires: Radio
Rocketry
To Boost: Boost through Great Scientist or Spy.
Requires: Radio, Chemistry
Combined Arms
To Boost: Have 3 Armies or Armadas
Requires: Steel, Combustion
Plastics
To Boost: Build an Oil Well.
Requires: Combustion
Computers
To Boost: Adopt a government with 8 inherent policy slots.
Requires: Electricity, Radio
Nuclear Fission
To Boost: Boost through Great Scientist or Spy.
Requires: Advanced Ballistics, Combined Arms
Synthetic Materials
To Boost: Build 2 Aerodromes.
Requires: Plastics
Information Era
Telecommunications
To Boost: Boost through Great Scientist or Spy.
Requires: Computers
Satellites
To Boost: Build 2 Broadcast Centers.
Requires: Advanced Flight, Rocketry
Guidance Systems
To Boost: Kill a unit with a Fighter.
Requires: Rocketry, Advanced Ballistics
Lasers
To Boost: Build 2 Drones.
Requires: Nuclear Fission
Composites
To Boost: Own 3 Tanks.
Requires: Synthetic Materials, Combined Arms
Stealth Technology
To Boost: Boost through Great Scientist or Spy.
Requires: Synthetic Materials
Robotics
To Boost: Have the Globalization civic.
Requires: Computers, Satellites, Guidance Systems, Lasers, Composites, Telecommunications
Nanotechnology
To Boost: Build an Aluminum Mine.
Requires: Composites, Guidance Systems
Nuclear Fusion
To Boost: Build a Nuclear Power Plant.
Requires: Lasers, Guidance Systems, Composites
Future Era
Seasteads
To Boost: Boost through Spy.
Advanced AI
To Boost: Boost through Spy.
Advanced Power Cells
To Boost: Boost through Spy.
Cybernetics
To Boost: Boost through Spy.
Smart Materials
To Boost: Boost through Spy.
Predictive Systems
To Boost: Boost through Spy.
Offworld Mission
To Boost: Boost through Spy.
