Classical Breakthrough Techs

[King Younk]

HBR is a neat way of entering the classical era too.
Nice for HA rushes, good for construction later if elephants are around, and a very good tradebait in it's own right. Requires more beakers into alpha though.
I look for an excuse to go this route most games because I really enjoy warfare.

I very seldom tech IW/Alpha/Math as it's usually techs that you can trade for.

Aestethics is very common in my games as it's one of the most reliable trading chips there is. About 50% of games I go there.
I do like CoL, but for some reason I seldom go there.

Does entering an era bring any advantage, or is it just an aesthetic thing?

 

[krikav]

For the player, it doesn't do anything except change the UI abit.
The AI though, gets some sort of era-bonuses, which differs abit depending on dificulty level.

Think it's something like that the AI gets +4% research bonus for every era it enters on deity.

 

[gavenkoa]

Think it's something like that the AI gets +4% research bonus for every era it enters on deity.

https://forums.civfanatics.com/threads/iaipereramodifier.523726/

In Assets/XML/GameInfo/CIV4HandicapInfo.xml section HandicapInfo:

<Type>HANDICAP_CHIEFTAIN</Type>
<Type>HANDICAP_WARLORD</Type>
<Type>HANDICAP_NOBLE</Type>
<iAIPerEraModifier>0</iAIPerEraModifier>

<Type>HANDICAP_PRINCE</Type>
<iAIPerEraModifier>-1</iAIPerEraModifier>

<Type>HANDICAP_MONARCH</Type>
<iAIPerEraModifier>-2</iAIPerEraModifier>

<Type>HANDICAP_EMPEROR</Type>
<iAIPerEraModifier>-3</iAIPerEraModifier>

<Type>HANDICAP_IMMORTAL</Type>
<iAIPerEraModifier>-4</iAIPerEraModifier>

<Type>HANDICAP_DEITY</Type>
<iAIPerEraModifier>-5</iAIPerEraModifier>

http://modiki.civfanatics.com/index.php?title=Civ4HandicapInfo says: A modifier which, multiplied for the current era, affects units cost, buildings cost, projects cost, unit support, unit supply, inflation rate, war weariness, civic upkeep, required food for city growth, unit upgrade cost. (in percent)