Quote Originally Posted by Kallera View Post
Everquest had a large series of factions, from rival city factions to roving monsters to gods. Being too far on the wrong side of a faction can mean having to fight the town guards that kill on sight("kos"), who were difficult to solo for some classes. Likewise, getting on the good sides of even the mobs could open quests for them.
Ah so it was more like WoW's Horde vs Alliance or their factions as well.

Still, it seems their faction system was more complex instead of just "grind this to 100% to get stuff". I think up to TBC there was only three factions that had a balance system (being friendly with one made you hated with the other). The most interesting one was the Goblin's since most people treated it as another city. However if you kept killing the npcs, you'd rank up with their hated pirates and could open up quests with the pirates (who are at the start flagged as enemies).