Quote Originally Posted by Sun of Chersonesos
I believe it would be wise for modders to include the following factions while modding:-

Irish
No. They were never unfied as far as I know.

The Coastal Empire of Cilicia (which is basically that coastal corner where in RTW tarsus and antioch is, on that coast)
Never heard.

Saudi Arabia
Modern state in medieval time...

Niger
...

Croatia
Hungarian province...

Bulgaria
In later mods, maybe. Check on twcenter.net. Bulgarians have some plans about it.

Kiev
Every medieval mod has Rus faction.