Higher Technology and Civic research costs, increasing with each era

Slightly reduced Science and Culture per citizen

Reworked calendar so the data matches much better with your in-game progress

Reduced the value of Eurekas and Inspirations from 40% to 25%

Increased Great People costs

Altered the set length of each Game Era to account for the new research costs

Increased the length of each game era

Increased the Diplomatic Victory score threshold from 20 to 30

Increased the "Research Ahead" penalty from +20% of the Tech/Civic research cost to +40%

Made roads slightly more effective

Increased the game era cost scaling of district projects

Increased amount of pollution needed for climate change (so it happens more slowly)

Slightly reduced population growth exponent