65666569
Grand Balance Patch
Requires a New Game, Won't Affect Saves
Main Benefits
Prehistoric Era is somewhat Longer Techwise. This is needed on most game speeds.
Controls Snowballing and Lets Others Catch Up to Leading Player faster . The reason is entering a New Era raises Costs, especially Construction.
Balance Tech Costs for Later Eras as they were currently really slow, and Early Game were really fast.
Controls

better. Longer Game Speed get more gold.
Buildings take longer to build so hopefully there is less 1-Turn Buildings.
Cities grow slower, about half rate at Classical. .
The New Values
You now start with 100

in Prehistoric because of Inflation.
The higher the number, the longer it takes (more hammers, culture, science needed). The lower, the faster. 100 = 100%.
6569 Update
Era | Research| Construction|Unit Training| Population Growth|Tech Modifer|Culture
Prehistoric| 75|115|115|150|75|75
Ancient | 125| 120| 120|175|100|100
Classical |125|140|140|200|125|115
Medieval |100|160|160|215|150|120
Renaissance |100|180|180|230|175|125
Industrial l|75|200|200|245|175|130
Modern | 75|220|220|260|200|135
Transhuman |75|240|240|275|225|140
Galactic |50|260|260|290|250|145
GoldModifier = Global percentage modifier for ALL costs. Higher equals less gold, lower equals more gold.
Gamespeed|New iGoldModifer|New Inflation % | New Inflation Offset
Eternity|80 | 10 | -720 |
Eons|90|15|-600|
Snail|100|25 |-480|
Marathon|100| 25| -360|
Epic| 110| 30 |-240|
Normal| 110|40 |-120|
Quick|120|50|-60
Blitz|120|60|-30