It all began when your contact sent you to a lab to bust up a raid by
the Devouring Earth. After routing the creatures, you spoke to Dr.
Steven Sheridan, who determined that the creatures had used the lab to
manufacture drugs that hamper the body's ability to fight off
Seeking more information, you went to a front company owned by Fauna
First, the eco-terrorist group aiding the Devouring Earth. There you
discovered that the creatures had turned on the activists and kidnapped
one of their members, Tanya Tyler. Your first attempt to rescue Tanya
yielded only a map, scrawled on a love letter written to the young woman
from the Devouring Earth's leader, Hamidon.
Tanya's map led you to her new location, and you learned her story:
Tanya knew Hamidon before he was the master of the Devouring Earth. She
told you that the creatures were probably created by a sentient bacteria
Hamidon developed, a bacteria he called the 'Will of the Earth.'
While your contact took Tanya to a safehouse, you went out to stop
another Devouring Earth raid. You defeated the monsters, but not before
they made off with several cases of fertility drugs. Your contact
proposed a theory: the drug thefts, Tanya's kidnapping, Hamidon's
strange attraction to her: all pointed to one conclusion. Hamidon
intended to change Tanya into a Devouring Earth matriarch, a creature
capable of breeding more Devouring Earth creatures.
While you were at the lab, Hamidon's monsters recaptured Tanya. You
rescued her again, but not before the Devouring Earth infected her. You
took her to a lab for treatment, but she transformed into a Devouring
Earth monster and escaped, leaving you no choice but to track her down
and defeat her.