The cold wave rages and signs of life wither away. When the sun shines again, people are amazed to find that beasts frozen since the days of old have emerged once more. They are to ancient viruses which miraculously possess the innate ability to survive against all odds.

Dr. Ripley has been working at GigaCorp as a senior technician seeking to intensify the power of the Holy Wrath. He wants to take advantage of GigaCorp's technology to extract viruses from ancient beasts and integrate them with the Infected in an attempt to cultivate the strongest force that the world has ever seen.

He calls his undertaking Project Behemoth. In his mind, once his experiment succeeds, Ripley and the Holy Wrath will take over the entire world.

The corpse of an ape, frozen since the end of the last Ice Age, becomes Ripley's first research subject and the first Behemoth to be cultured in his lab. Ripley calls it "Behemoth Mk I".

After a series of experiments, the ape's corpse is fused with R13 cells and regains its fury. Its heavy artillery makes it an immense power source for Ripley's project.

But after one of the experiments, the ape managed to escape and enter the survivors' camp. Sarge and his friends captured the ape and kept it in the Behemoth Lab, where it was put to good use by the Chiefs.

The Behemoth Lab

Building structure: Lab + Fighting Pit

A circular hollowed-out building with two imprisoned Behemoths in the center.

Being locked up in chains, the Behemoths have become even more furious, gnashing their teeth and stomping their feet.

More Information on Behemoths

Ripley's Project Behemoth uses ancient viruses and the R13 virus in an attempt to stimulate genetic energy and mutate these beasts, yet their power doesn’t merely get enhanced by these mutations.

The Behemoths' power is enhanced thanks to a serum produced by extracting genetic samples frozen in the corpses of ancient creatures and culturing them in the lab.

But there is a limit to these power enhancements, because the genes hold everything inside of them, and the bloodline limits of the genes must be somehow exceeded if continuous power enhancements are to be achieved.

After making very precise calculations, Ripley discovered that by infusing the Behemoth cells, he was able to stimulate the bloodline, and theoretically exceed their genetic limitations by a factor of four, and each breakthrough amounts to evolution of the bloodline.

Ripley names these five Behemoths whose bloodlines were evolved as: Bane, Fury, Calamity, Tyrant, and Death.

When the power and bloodline are enhanced and the mutation of the ancient viruses and the R13 virus are fused, they can be equipped with just the right weapons to awaken insurmountable power.

To harness this insurmountable power, a Power Supply is needed to train and store the power on a regular basis. After the power has been stored 16 times, a special kind of golden dust should be used to awaken more power.

In order to adapt the Behemoths to different environments, researchers have developed an active skin that allows them to take on different physical appearances.

[Behemoth Skills]

Artillery Barrage

Destructive Ray

Electromagnetic Shield

Dominating Aura

Thunderous Wrath

[Behemoth Boss]

In order to create Behemoths, Ripley has used a range of different beasts in his genetic experiments. He has even combined the genetic chains of different creatures in an attempt to create new species.

After a mistake in Ripley's experiment, a Behemoth variant went berserk and devoured the other variants before escaping from the lab.

Driven by its instinct to gorge and devour, it gobbles up everything within sight. Humanity's Final Hope sends out a command, asking all Settlements to unite in an effort to stop it.

A failed Behemoth experiment subject became a monster that devours everything whole.

The genes of the devoured creatures then allow the monster to evolve further. This process can continue forever.

Humanity's Final Hope issued a call to action for all the Chiefs to come together and destroy the monster.