The Factions

Just to give some sense of the sheer complexity of this game.... Here is a list of all of the antagonists, each with their own agenda...

The Archangels
Asmodeus
Baal
Gabriel
Lucifer
Michael
Raphael
Uriel
Avestriel
Gheed
Muth'la
Papa Legbah

The Angels
Nelchael
Salilus
more...

The Archdemons 
Magog
Huwawa
Sineya
Grendel? 
more...

The 72
Marduk
Neberius
Sallos
Makaratus
"Thunderhead"
Azag Ur Shanabi
more...

The Atlanteans
Xanthar
Xalisana
Marcus (Arcantos)
Simon Magus 
The Owls
The Hermetic Order of the Golden Dawn
The Flame and the Blade
The Dagger and the Candle
more... 

Man
US Government
Augustinians
Slick Dilbert & Co.
Black October (Russian)
Magicians (Logan Sachs, Minos)
more...

Great Dragons
Behemoth
Leviathan

Loa
Aguae
more...

Independant non-Baalian, non-Tarot Gifted
Doug Henderson
Marzouq Ibn Abdul-Wahaab
more...

Asmodean Tarot
The Magician
The Hanged Man
Ganymede
more...

Others
Ling
The Hesh

God