The Neo Cults worship pagan gods, some ancient and some new. Some are benevolent, like the Druids, and some are malevolent, like Children of Mephisto. The cults have no central authority. They are not actually a faction, but just a convenient way to classify practitioners of religious magic.
Greek, Celtic, and Scandinavian pantheons command the largest number of followers among the neo-cultists, with Native American and Hindu gods being a close second.
Cults exclude the following major religions and denominations: Buddhism, Hinduism, Judaism, Christianity, Islam, and Taoism.
Cults can be loosely classified by their beliefs:
Greek and Roman Pagans, worshipping one or more deity or creature from the classical mythology.
Scandinavian (Viking) Pagans, Druids, Volkvi (Russian Druids), Japanese Pagans, Chinese Pagans, etc.
Odd offshoots of major religions, rejecting the doctrine of the majority, such as Satanists and Order of Broken Cross.
Cults based on an entirely new belief system, such as presence of extreterrestrial beings.