[@Amphibious Assualt]Though there are 18 Old Gods, not all will appear, and yes they will be NPCs, not entirely 100% on giving a Godly character to a random person.

Also, most Old Gods despise each other, especially the Evil side, and pretty much want to murder one another. And despite their immense power a majority of them are docile, they are bound by the Gods to remain so, even the most twisted ones such as Zul'kafh & Tor'qux are prevented from mass murdering the entire planet by a higher power.