12 civilizations but only 10 campaigns

[Alexander311]

Those two factions were not important enough historically to have a campaign. The Ebla never came close to conquering anyone (and were themselves quickly eliminated), while the Nomads were also pretty insignificant (in the Bronze age). Also, those two factions are not as unique as the other 10...so we thought that playing as them would not be as interesting. However, we did allow them in the Survival mode, just because we later found out that people wanted to play as them.