Any Chaos Space Marine army may include units of Chaos Cultists, counting them as troops choices on the force organisation chart.

Across the countless worlds of the Imperium, there are many who plot and rebel against their masters. Most dangerous of all are those who become seduced by the power of Chaos, believing that the worship of the Dark Gods wilt give them a quick and easy way of achieving their goals. The lure of Chaos attracts all manner of men on all kinds of different worlds. Planets which vary tremendously in their civilisations and technical achievements all harbour the followers of Chaos from the most blood-splattered practitioners of ritual worship on feral worlds to the sophisticated membership of secret societies on Hive Worlds. Even on comfortable, civilised worlds there are those who crave forbidden knowledge, whose lust for unearthly power and arcane lore overrides their loyalty to the lmperium. All over the galaxy, even upon Mars and Ancient Terra at the heart of Mankind's rule, there are heretics willing to dabble in dark arts beyond their understanding.

The ever-present dangers of discovery by the Inquisition and other Imperial agencies make it imperative for Chaos cults to conceal their activities. Under the guise of normality, perhaps beneath The legitimate facade of a labour union, charitable organisation or business venture, the cult will accumulate power and additional members through blackmail, bribery and corruption. Once the cult has become strong enough it will start an uprising which with the blessings of the Dark Gods, will deliver the entire planet into the arms of Chaos. The cultists will summon plagues of Daemons through possession, ritual and sacrifice, they will send forth a call to draw renegades and Chaos Space Marines to their aid, If their efforts meet with their gods' approval they may even be blessed with a Greater Daemon or Daemon Prince to lead them against their foes.

One way or another Chaos Cultists are utterly damned. If their revolt fails, the terrible retribution of The Emperor's minions will be exacted upon the survivors. If it succeeds, the Cultists will have unleashed the power of Chaos and all but the most powerful members of the cult will be enslaved by Daemons on a hellworld of their own making.

Squad: A Chaos Cultist squad consists of between 10 and 50 Cultists.

Weapons: Close combat weapon .

Options: Any model may be given a laspistol/autopistol for +1 point or a lasgun/autogun/shotgun for +1 pt, up to one model in ten may be given one of the following weapons; plasma gun at +6 pts, meltagun at +6 pts, flamer at +2 pts, heavy bolter at +6 pts, grenade launcher at +8pts, heavy stubber at +4 pts or an autocannon at +6 pts.

One of the Cultists may be upgraded to a demagogue at an additional cost of +4pts. The Demagogue may be given additional equipment, Marks of Chaos and Gifts from the Chaos Armoury in Codex Chaos Space Marines up to a total value of 40pts.