Egypt has Desert / Flood Plains / River (the Nile);
Iriquois has Forest / Plains;
That's all I know off the top of my head, I always hit Disable Start Bias...
The XML files that determine all of that.
See this topic
http://forums.civfanatics.com/showthread.php?t=470224&highlight=bias
Or here if what I directly pasted from the XML as well. Same as topic.
<CivilizationType>CIVILIZATION_CARTHAGE</CivilizationType> <StartAlongOcean>true</StartAlongOcean> </Row> <Delete CivilizationType="CIVILIZATION_SPAIN"/> -<Replace> <CivilizationType>CIVILIZATION_SPAIN</CivilizationType> <StartAlongOcean>true</StartAlongOcean> </Replace> </Civilization_Start_Along_Ocean> -<Civilization_Start_Region_Priority> -<Row> <CivilizationType>CIVILIZATION_CELTS</CivilizationType> <RegionType>REGION_FOREST</RegionType> </Row> -<Row> <CivilizationType>CIVILIZATION_NETHERLANDS</CivilizationType> <RegionType>REGION_GRASS</RegionType> </Row> </Civilization_Start_Region_Priority> -<Civilization_UnitClassOverrides>
why would america have a river start bias?
<!--<Row>
<CivilizationType>CIVILIZATION_AMERICA</CivilizationType>
<StartAlongRiver>true</StartAlongRiver>
</Row>-->