(The following information is not general knowledge in the Mutant Chronicles universe. This is a reference for Heretical character, or those who would have at least Average level in Lore of Mutant Chronicles or Lore of Dark Symmetry. Unless your character has these knowledge areas, you should read no further.)
Dark Technology
Dark Technology is divided into several types, and is mostly the purview of Algeroth, the Apostle of War. Sometimes, it is generically referred to as "Necrotechnology" or "Necrotech", but it is more accurately divided into three categories: Black Technology, Necro Technology, and Bio Technology.
One thing that all of this Dark Technology has in common is that those who handle it run the risk of Corruption.
Black Technology
Black Technology refers to the taking of existing machinery - typically of human origin - and twisting it by means of the Dark Symmetry. Items modified in this way tend to become darker, more disturbing versions of their former selves. Surfaces are sometimes covered with sharp, barbed points, sometimes to the point where it seems almost impossible to wield the item without impaling oneself. Metal often takes on a twisted, molten appearance, or else it becomes dark and has a mottled, pocked appearance - as if it had been terribly corroded, then blasted clean, but still bearing the wounds of severe rust spots. Generally, "necrofied" metal takes on a blackish, stained appearance.
Although items modified in this way often look broken or molten, they in fact work optimally, and typically with greater performance than before ... just that they tend to be less reliable.
Some weapons of Black Technology look quite alien, while others intentionally look more like those of human origin - More than one unwitting human has taken up a gun of the Dark Legion and made use of it, only to be started down the road to Corruption by continued contact with the unholy artifact.
Necro Technology
Necro Technology is the "science" of taking dead organic material and reviving it by unholy means, incorporating it into machinery and using it as a vessel for dark spirits to bestow a malevolent intelligence to formerly inanimate objects. Many of the vehicles in the service of Algeroth are prime examples of this technology, looking like broken hulks of human vehicles that have been invaded by patches of rotting flesh that somehow direct and enhance the performance of the craft, without need for drivers. Sometimes weapons are enhanced with necro-technological features, and of course, this is extended to the raising of dead soldiers to join Algeroth's ranks of the Undead Legionnaires.