The Tyranids are a ravenous race of aliens that have traveled through the cold darkness of the intergalactic void in order to feed upon this galaxy. Vast swarms of scuttling creatures, winged horrors and towering monstrosities consume everything in their path, scouring whole planets of life and devouring entire civilisations. The Tyranids are the ultimate predators against which even the mightiest of armies are naught but prey for the slaughter. Code: Tyranids is one of a series of supplements for Warhammer 40,000. Each book in the series describes in detail an army, its history and its heroes. "An alien threat has risen from beyond the abyss, a swarm so vast that it blots out the stars. This horror fights neither for power nor territory, but rather to feed a hunger so insatiable that it will eventually devour the entire galaxy."

• Inquisitor Krytman