Before BravoEditBefore HazTeam Bravo came to Area 51, Delta was sent to investigate the mutagen disturbance. It came to a unknown position and all the officers except for Chew was killed, along with the survivors he fled. The team came to find the Weapons Range.
Ethan Cole learned that HazTeam Delta was still alive because of the live transmission by Lieutenant Chew. He then opened a door to find a vast large hall with mutants surrounding Delta and Chew. He jumped down to Delta and Marcco quoted and then Chew quoted. Ethan was sent by Chew to the armory.
Ethan and Chew got on the turrets after Ethan had retrieved the plasma shells blasting every mutant in sight. Marcco and a unknown Delta teammate went on the turrets to cover them getting explosives. Chew guarded the entrance to the second armory.
after ethan passed the explosives to chew chew sends ethan to enter the left turret then shoot and detonate the explosives.
the explosion opens a hole in the wall from which zombies come in and then zombies come from both balconies on top.
when the team kills all enemies with the help of ethan on turret a cutscene opens.
it reveals thaat the beast that killed Delta team's first members as well as Chrispy and Ramirez is a theta.
all the haz's are dead except ethan and chew.
the last cutscene is the last moments of ethan's humanity and the last minutes of chew's life.
a scene shows dark soldiers arming bomb as they placed detonating bomb on the maintenance elevator
to kill the hazteam survivors.
ethan helps chew get up and asks him about the creatURE that appeared. ethan said he thinks it is the one to kill his team.
they walk to the maintenance elevator and they wonder who created it.
it appears to be a launch tube. chew calls Major Bridges informing him of the death of his teammates
as well as the companion of his: Ethan Cole. that's when the bomb explodes knocks out chew out of the launch tube and ethan into a emergency chute. with this the final cutscene opens up revealing the reason of mutation of ethan cole. the zombie kills chew biting him dead then bites cole poisoning his body. he turns into a mutant and then we see the flying body of chew telling ethan what to do.