Space Marines are the finest warriors Humanity has ever known. Their skill, bravery, their commitment to the Imperium are unquestioned. And of these warriors, only the elite are chosen to serve in Terminator Squads, trained to operate in the most dangerous of battlefield conditions and in the dark vacuum of starship boarding actions. It is usually the chapter's 1 st Company who are picked for this honour – Marines who have proved their courage time and again in countless battles across the galaxy.

Terminator Squads are issued with Tactical Dreadnought Armour. The Marines are armed with Storm Bolters and Power Gloves, Assualt Cannon and Chain Fists – the best armament the chapter con provide. Each suit is many centuries old. Each bears the scars and medallions of ancient actions and is treated with the reverence of the chapters most sacred relics. The right to wear this armour is a high honour for a Marine: he carries the memories of the chapter's past heroes into every battle.

Terminator Squads are required only in the most extreme situations – such as boarding a space hulk to exterminate the aliens that infest it. They are a Chapter's final resort, the last bastion that stands between the Imperium and those who threaten Mankind.

In the annals of many Chapters are written the tales of defiant stands by Terminator Squads, facing the enemy when their brothers have fallen, rising from the rubble of a bombarded emplacement to halt an armoured assault. Scorning fear, laughing in the face of danger, they defy Death itself to save their brethren and the honour of the Chapter.

Horrors are demons form the darkest parts of the warp known as chaos - a hell dimension were the will of men is bent and twisted until it has consumed into madness. Chaos demons like horrors can breathe fire or worse. But when summonsed straight from warp space to real space their powers are week and they must quickly feast on the souls of the living.

Only the darkest and evilest powers of chaos can bring forth such hideous beasts. When a warp portal is opened only the strongest horrors will brake free of the fire pits of Chaos. Strong and fast they quickly subdue their pray, only through continual feeding will they keep the strength from being pulled back into the warp. As they emerge from chaos the tuff hides are burnt and ripped as the warp try's to drag them back in. Usually glowing molten rock and burnt blood, their flash is incredibly hard! Sharp teeth, four clawed arms and nothing to loose except being pulled back to Chaos the horrors posses all the tools to be one of the most dangerous evils in the universe.

Driven to conquest, the Genestealers will perish unless they find new victims. Unable to breed with each other, they must seek other races to infect – crossbreeding to form grotesque hybrids.

Genestealers are psychically strong. They have tested themselves against others and emerged victorious time and again. There is only one being in the entre galaxy they fear – the Emperor of Human space. They have tasted his mind and do not dare face him. Thus they infiltrate the Imperium, slowly, carefully. Their children, part-Human, part_Stealer, insinuate themselves into position of power, manipulating and controlling the humans around them, awaiting a time when the Emperor is too weak to resist – then they will strike.

From a subtle circle of covens, spread across many systems by the most Human of their children, they will burst forth in an uncontrollable orgy of infection. They will bring Mankind to its knees, and farm it for the rich variety of genes it contains – they must conquer or die.