In the Civilization V scenario Empires of the Smoky Skies the technology tree has been altered a lot. The players start with all the regular technologies up until and including the Industrial Era, but after that the eras and technologies have been changed: first there's the Steam Era, then the Airship Era and finally the Future Era.

Steam EraEdit

• Analog Computation
• Economic Imperialism
• Eruptives
• Expedition
• Landships
• Propulsion
• Vertical Integration

Airship EraEdit

• Airships
• Automata
• Civil Defense
• Galvanomagnetism
• Gospel of Wealth
• Infernal Combustion
• Land Leviathan
• Noblesse Oblige
• Radio
• Robotics
• Sky Fortress
• Subterranean Exploration
• Uranography

Future EraEdit

• Perpetual Motion
• Technocracy
• The Grand Idea