Genestealers are peerless predators, swift vanguard organisms armoured in chitinous plates and possessed of terrifying strength and agility. Their broods move far ahead of the Tyranid hive fleets, to seek out fresh feeding grounds and spread their insidious genetic infection amongst the defenders. When the invasion swarms finally descend, the Genestealers burst from hiding to begin the slaughter.

Termagants are scuttling predators that attack in huge swarms, armed with living weapons that spit flesh-eating organisms and venomous spines. Originally spawned to roam the tight arterial passages of hive ships and hunt intruders, Termagants harry their prey with a hail of firepower, seeking always to outflank and envelop their victims as they erode their numbers.

Lictors are a sinister adaptation of the Tyranid Warrior bioform, specialising in infiltration, scouting, and assassination. Hidden by their chameleonic skin, these vanguard beasts stalk their prey beyond the reach of the Hive Mind's synaptic web, leading the greater swarm to fresh targets with a potent pheromone trail. Lictors pick off their prey opportunistically, always looking for a chance to crack open an unwary skull and use their feeder tendrils to suck out the secrets within.

The Venomthrope's whip-like tentacles drip with a multitude of alien poisons. Indeed, so potent are these toxins that it is believed that a Venomthrope's very touch means certain death.

Termagants are fast, agile and cunning creatures. When a Tyranid Hive Fleet descends upon a prey-world, Termagants scuttle forward on four legs whilst unleashing torrents of fire from the bio-weapons that serve as their forelimbs.

Neurolictors are nightmarish living weapons of psychological warfare, engineered to implant mind-altering parasites and project a neural disruption field that provokes atavistic terror responses in even the most hardened prey. As an offshoot of the Lictor bioform, Neurolictors possess a nigh-supernatural ability to evade notice – which renders their sabotage all the more terrifying, as these insidious effects often seem to emerge from out of thin air.

Barbgaunts are little more than living weapons, their bodies and biological cannons slaved to the will of a pulsating ganglio-parasite that piggybacks them into battle. Once there, they unleash volleys of chitinous barbs that detonate with the fury of violent muscle-spasms, transfixing nearby victims with a hail of jagged projectiles.

Each Norn Emissary is a purpose-bred beast, spawned by its Norn Queen to accomplish a specific and singular objective – be it hunting a strategically gifted commander, abducting a knowledgeable prey-being, or pursuing some other ineffable goal. These colossal heralds of the Hive Mind's agenda meld terrifying psionic potential with speed, intelligence, and monstrous strength, ensuring that a Norn Emissary is more than equal to its alien task.

When Tyranids invade, the Broodlord leads his followers into battle, often appearing from sewers or hidden vents to cause untold carnage amongst the enemy army.

The Tyrannofex has the armour and fortitude of a living battle fortress and its weaponry eclipses that of its foes' most powerful battle tanks in both quantity and devastating potential.

Swooping on leathery wings, Parasites of Mortrex use their barbed ovipositors to drive Ripper gestation pods deep into their victims’ bodies. These swiftly-growing creatures soon chew themselves free from their unfortunate hosts. Such was the fate of the defenders of Imperial planet of Mortrex, the world first cursed by the Parasites’ onslaught. Now they wreak havoc on the foes of the Hive Fleet by soaring over defences and seeding unlucky souls with nascent Rippers.

Gargoyles are often the first wave of a Tyranid swarm to be seen in battle.

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The Tyranids are rapacious alien swarms that emerge from the cold darkness of the intergalactic void. Guided by the unknowable intellect of the Hive Mind, these nightmarish super-predators hunt, kill, and feed without end, stripping world after world of biomass and leaving nothing but airless rocks in their wake. When the Tyranids make planetfall, a seemingly endless tide of Termagants spit vile living ammunition at hapless defenders, while writhing Ripper Swarms surge over the wounded and dead alike. These creatures are guided by intelligent Tyranid Warriors – vicious bioforms bristling with organic weapons – and a monstrous Hive Tyrant, the towering psychic lynchpin of the swarm's advance.

Biovores are living artillery pieces, swollen with the clutch of explosive Spore Mines that they nurture within their bodies. Upon anchoring itself to the ground with chitinous spurs, a Biovore undergoes violent spasms that expel its volatile offspring in high arcs as living ammunition. From there, the gas-bloated Spore Mines detonate in a shower of bone shards and acid rain, or else drift languidly down onto the battlefield, primed to explode whenever prey draws near.

Like the questing tendrils of some impossibly vast monster, the Tyranid hive fleets push deeper into the galaxy with every passing day. For every swarm destroyed by desperate defenders, another three drift into the light of beleaguered stars, ready to do battle. The Tyranids cannot be bought off, reasoned with, or put to flight – only fought or fled from. Against their seemingly inexhaustible numbers and endless hunger, even the thick hulls of voidborne craft cannot offer true safety from the Hive Mind.