Dark Compliance is the forty-third audio drama for The Horus Heresy series that was not originally released as part of an anthology or other release. Dark Compliance was first released as an audio drama in July 2017.
As Horus's rebellion gains momentum, more and more worlds flock to his banner. For some, it is through fear of annihilation; for others, it is out of malicious desire. Any that consider resistance are given one chance to swear fealty. To do anything other is to court disaster and worse. Accazzar-Beta is one such defier, but in bringing this heavily-fortified Mechanicum world to heel, just how far is the Warmaster willing to go and what truly is the meaning of a Dark Compliance? As two fleets engage across the gulf of the void, Accazzar-Beta will find out.
- Dark Compliance (Audio Drama) by John French