The Tyranids are the most rapidly evoloving race in the galaxy, super-predators destined to hunt all others to extinction.
From the cold darkness of the void comes a race of ravenous aliens, a numberless horde governed only by the instincts to hunt, kill and feed, Each Tyranid is a living weapon, perfectly adapted to its designated function, but each creature is no more than a single cell in a galactic entity governed by a monstrous Hive Mind. As the Tyranid hive fleets grift through space, they strip all life from the worlds in their path, leaving nothing but scoured rock in their wake.