"Bang.. Bang.. Bang.." The sound of continuous firing resounded from the laboratory, mixed with Beltway's "warm" and "friendly" "greeting"...

The second tyrant was quickly beaten into a sieve by the crowd and fell to the ground, but even though its huge body had been hit by bullets to the point that it could not stand up, it could still let out a roar full of anger from its mouth.

Seeing that the tyrant was howling vigorously on his back to the sky, everyone present aimed at its vital parts and fired a few more bullets, and soon it became weak and weak, and in the end it could only lie on the floor and "inhale the ground"...

The final mending work was still done by Zero, and after a sniper rifle went off, the tyrant's head turned into a rotten watermelon again!

"Side quest 2: (Hell)' Kill the 'Tyrant'... We... （5/6）”

Looking at the corpse of the tyrant whose head had been shattered, everyone breathed a sigh of relief.

But just as half of the big guy's breath was stuck in his throat, a sudden sound of messy footsteps came from the direction they had just evacuated, and at the same time, the iconic roar of the zombie was getting closer and closer.

"Strange.. The effect of the pheromone smoke screen has disappeared, and it seems that the sound of our battle here has attracted those zombies..."Seeing the large number of zombies that had appeared in the field of vision, Four Eyes immediately turned his head and explained to Ruper.

"And among them are our 'old friends'... Gan! F*** (Harmony)..."Beltway immediately aimed his weapon at the zombie that was walking towards them.

But when he only killed the single-digit zombies, he put away his weapons in great anger.

The simultaneous appearance of the two tyrants greatly depleted the weapons and ammunition reserves carried by everyone, and Beltway, who had already run out of bullets, could only loudly "spit fragrant" at the zombies whose footsteps were slightly staggering...

The rest of the people had similar ammo reserves to Beltway, but they still had a lot of pheromone smoke bombs left, and after covering the area in front of the zombie horde with a layer of red smoke again, everyone was ready to move on to the next ammo storage point immediately.

Zero silently followed Beltway and turned to evacuate, when suddenly, as if noticing something unusual, he turned around and looked at the area covered by the red mist with the scope on his gun.

Two seconds later, Zero immediately issued a warning: "Hey! Guys, you'd better take a look, there's something in that smokescreen... Belch.. Something is wrong..."

As the maker of the pheromone smoke screen, Four Eyes stopped and looked back at the first time, and after this battle cooperation, Zero's early warning of the crisis was recognized by everyone, and he said that something abnormal had happened, which was absolutely true.

Just as everyone turned their weapons behind them with wary faces, thinking that the last remaining tyrant would burst out of the red mist, reality slapped them in the face.

What appeared in front of everyone's eyes was just a zombie, a red zombie with highly decomposed skin, muscle tissue completely exposed to the air, and scratching and biting marks all over its body!

Then more and more zombies came out of the range shrouded in red fog one by one, and Four-Eyes, who had studied all kinds of zombies, was shocked to find that these guys in front of him had all evolved into berserk zombies that could be immune to the interference of the "pheromone" effect!

And from the appearance, the four eyes can also see that their bodies are in some kind of mutated unstable state at this time!

When ordinary zombies absorb enough nutrients or are stimulated by some special drugs, the virus latent in their bodies will become extremely active, and then their bodies will undergo irreversible unknown mutations.

When the first mutation of an ordinary zombie is completed, it will enter a relatively stable state, and then it will immediately start to accumulate energy for the next evolution.

And this stage is called "berserk zombies" by the scientists who study them!

The skin of the berserk zombies will become highly decomposed and then gradually peel off, and the musculature will be exposed at the end, making it look like it is bloody.

The nails of the hands and feet will grow rapidly due to the large amount of metabolism in the body, and the proportion of the brain will gradually begin to increase, etc., and of course, their aggression and desire to eat will also increase!

Due to the fact that the Berserk Zombie consumes almost all of its stored energy when mutating, it will always be in a state of extreme hunger until it has enough bio energy to evolve again, and then immediately undergo a second mutation!

(PS: If the berserk zombie can absorb enough biological energy, then it will mutate again and become the well-known "licker", of course, it will occasionally evolve a variety of strange "strange species", and the naturally generated lickers are almost all evolved from the berserk zombies...) ）

Driven by extreme hunger and primitive instincts, rampaging zombies are very aggressive, and a series of mutations in their bodies will make them walk faster, smell (and hear) more sensitive, and more threatening!

To put it simply, it has been upgraded from "Wu Lao Er with severe cerebral thrombosis" to "patients with polio sequelae and mild muscle atrophy"...

Four-eyed, who has never been alarmed, and can even extract blood samples from live zombies with an expressionless face, is full of incomprehension in her eyes at this time, if it weren't for the current crisis, maybe she would immediately catch a berserk zombie and come back to do vivisection experiments.

At this time, the others also knew that it was a berserk zombie that appeared in front of them, but Four Eyes was still whispering on the side: "It's strange, just slightly modified the formula of 'pheromone' would..."

Zero looked at the furious zombies who were slowly trotting towards his group, and a thoughtful expression appeared on his face.

Almost instantly, he knew the reason, turned his head and said in a deep voice to the four eyes: "It's not the recipe, but your 'pheromones' have accelerated the metabolism in the corpses countless times, and they have absorbed abundant biological energy by devouring each other, and I estimate that those 'pheromones' should still be working, that is..."

Before Four-Eyes could finish speaking, he immediately shouted to everyone: "Captain, let's move quickly, these guys are about to mutate into 'lickers'!" ”

Now that everyone's ammunition reserves have long been at the bottom, it is definitely not a good idea to fight these hideous-looking and evolving berserk zombies with the cold weapons in their hands.

What's more, the tall and sturdy tyrant is like standing out from the crowd of rampaging zombies, this scene seems to be like a popular traffic artist (drama) person (son) surrounded by dozens of security guards in a large airport...