AoM was a product of its time, many ideas there are extremely outdated.
I think it would be really better to skip DE for it and go ahead to 2.
As for factions:
Greeks, Egyptians, Norse, Atlanteans and Chinese were in original.
I kind of wonder what could there be too?
I mean there are quite many.
Mythologies by region
Africa
Further information: Traditional African religions
Central Africa
East Africa
- Dedun (Nubian mythology)
- Dinka mythology
- Lotuko mythology
- Maasai mythology
- Somali mythology
North Africa
Southern Africa
West Africa
Further information: West African mythology
- Akan mythology
- Dahomean mythology
- Dogon mythology
- Efik mythology
- Igbo mythology
- Serer mythology
- Urhobo mythology
- Yoruba mythology
African Diasporic
Further information: Afro-American religion
Asia
Central Asia
Northeast Asia
- Ainu mythology
- Bai mythology
- Chinese mythology
- Japanese mythology
- Korean mythology
- Manchu mythology
- Mongolian mythology
- Qiang mythology
- Ryukyuan mythology
- Siberian mythology
- Tibetan mythology
South Asia
Southeast Asia
- Burmese mythology
- Indonesian mythology
- Malaysian mythology
- Philippine mythology
- Vietnamese mythology
West Asia / Middle East
Further information: Religions of the ancient Near East
- Abrahamic mythology
- Elamite mythology
- Hittite mythology
- Iranian mythology
- Mesopotamian mythology
- Semitic mythology
Caucasus
- Mythology of the Caucasus
- Armenian mythology
- Circassian mythology
- Georgian mythology
- Ossetian mythology
- Vainakh mythology
Oceania
Europe
Further information: European folklore
Eastern Europe
Northern Europe
Further information: Scandinavian folklore
Southern Europe
Western Europe
Americas
Main article: Mythologies of the indigenous peoples of the Americas
Further information: American Folklore
North America
- Abenaki mythology
- Blackfoot mythology
- Cherokee mythology
- Choctaw mythology
- Creek mythology
- Crow mythology
- Haida mythology
- Hopi mythology
- Inuit mythology
- Iroquois mythology
- Lakota mythology
- Navajo mythology
- Nuu-chah-nulth mythology
- Ohlone mythology
- Pawnee mythology
- Tsimshian mythology
- Zuni mythology
Central America
- Aztec mythology
- Maya mythology
- Mixtec mythology
- Olmec mythology
- Talamancan mythology
- Zapotec mythology
South America
Mythologies by religion
Further information: Religion and mythology
- Buddhist mythology
- Christian mythology
- Hindu mythology
- Islamic mythology
- Jewish mythology
- Wiccan deities
Mythologies by time period
Ancient mythologies by period of first attestation.
Bronze Age
- Canaanite mythology
- Hindu mythology
- Chinese mythology
- Egyptian mythology
- Hittite mythology
- Hurrian mythology
- Persian mythology
- Proto-Indo-European mythology
- Norse mythology
Iron Age
Late Antiquity
Fictional mythologies
Further information: Mythopoeia
- List of fictional deities
- Cthulhu Mythos
- William Blake’s mythology
- Bumi Langit Universe
- J.R.R. Tolkien’s Middle-earth
- Marvel Comics universe
- DC Universe
- Discworld
Rise of Nations 2 could be next game after Age of Mythology 2.