Yu Tian's face darkened and ran towards the laboratory gate, but before he could rush into the buffer corridor in front of the laboratory gate, he heard a roar of the door closing in his ears. When he rushed into the corridor gate was locked, the indicator light marked forbidden passage on the door was so dazzling.

Yu Tian took out the access control card and pressed it on the access control.

"Didi."

"The password is entered incorrectly for three consecutive times, the laboratory door is automatically locked, and the access card identification is invalid!"

"Please try again in half an hour."

"Damn it! I'm careless."

Jiang Huaqiang must have deliberately entered the wrong password on the password lock outside after going out. At this moment, the system automatically locked the access control. He could only wait half an hour before using the access control card and password to re-activate it.

Yu Tian's expression was a little gloomy. Jiang Huaqiang probably wanted to lock himself inside and let the zombies inside bite to death.

"If this is the case, then you have miscalculated. Ordinary zombies are useless to me."

Yu Tian pressed the empty magazine back on the bullet and went back to the second-level giant zombie to dig out the second-level nightmare crystal. As soon as he got up, a throbbing in the depths of the laboratory suddenly attracted Yu Tian's attention.

Rumble.

Dongdongdongdongdong.

As if the sound of something dragging on the ground or as if the roar of heavy steps fell, Yu Tian's brow became more and more tight, and he replaced it with a brand new magazine and walked towards the direction where the sound appeared.

The moment he was around the corner, Yu Tian's pupils suddenly shrank!

In front of him, there was a group of zombies! More than thirty! And at the end of the group of zombies, Yu Tian obviously felt a terrifying aura like an abyss. He had only felt this aura in one thing!

That third-level power strengthens the zombie!

"How come there are third-level zombies here!"

At this moment, even Yu Tian couldn't calm down anymore. He raised the desert eagle and poured bullets towards the zombies in front of him.

He must clear out enough activity space before the third-level zombies appear, otherwise he will have no chance of winning if the zombie group pounces on him!

Bang bang bang bang!

The enhanced desert eagle hitting the first-level zombie is simply a nightmare. It was originally a blood hole the size of a bowl, but now it has expanded a circle, and even the explosion of the warhead directly exploded the body of the first-level zombie.

There is no need to shoot the headshot. As long as you hit the spot above your chest, a zombie will be basically useless.

But Yu Tian only has two magazines and twenty bullets, and no matter how accurate the sharpshooter is, he cannot guarantee that he can shoot him to death.

Yu Tian killed eighteen zombies and ran out of magazines, but nearly twenty zombies swarmed towards him. What's so bad is that Yu Tian already felt that the third-level zombie behind the zombie group was getting closer and closer.

Yu Tian pulled out the third-level bone knife and rushed into the zombie group. The first-level zombie cut melons and vegetables under the sharp blade, but at this time the third-level zombie finally appeared.

The moment he appeared, Yu Tian's pupils tightened as if they were the tip of a needle. The tension and disbelief that he had never experienced before made Yu Tian's eyes become extremely dangerous for the first time.

"Third-level organ strengthening, acid zombie king!"

"Ho huh!"

The violent third-level acid zombie was actually just a female zombie. She was wearing a white coat and let out a deafening roar at Yu Tian in the distance.

The production speed of acid in the third-level acid zombie can fully meet the attack consumption. Her belly is only the size of a normal human, and the outer surface of the acid sac in the body is ossified. Neither the first-level nightmare ammunition nor bullets with a caliber caliber than 9 mm can penetrate, and the movement speed is as agile as ordinary zombies.

Fortunately, someone used a fire axe to chop the axe on the leg of the Acid Zombie King. The fire axe was embedded in her thighs, making her walk limp and unable to get fast.

But there were seven or eight same quasi-second-level acid zombies beside her. Seeing Yu Tianshi's eyes rolling round, he spread his legs and rushed towards Yu Tian.

"Here you come!"

The third-level acid zombie king was far away and sprayed a yellow-green acid squirting at Yu Tian. Yu Tian had already reacted when he saw her throat trembling. At this moment, he used the 12-point agility to the extreme and quickly pulled out of the zombie group.

But this time the third-level acid zombie sprayed the acid water column after continuous pressure!

The acid droplets sprinkled on the head were denser than the heavy rain. The hairs behind Yu Tian's head stood up unconsciously, and the speed under his feet increased again when it was almost impossible. Finally, at the last moment, he rushed out of the attack range of the third-level acid zombie king.

"Ho huh huh."

"Ho ho..."

The spilled acid liquid fell on the ordinary zombies in front of them, causing them to scream in fear. At the same time, all the bodies contaminated with the acid liquid began to corrode and melt at a speed visible to the naked eye, and the flesh and blood melted in the blink of an eye and only bones remained.

The zombies at the front were the most miserable. The flesh and blood on their bodies were corroded, and only a white skeleton was left on the ground.

If humans get a little bit of it, a large piece of meat will be rotted.

Da da da da da!

Yu Tian continued to pull the distance backward, and at the same time, his right hand kept flashing one level of nightmare ammunition one after another and put it into two empty magazines.

The third-level acid zombie roared and limped towards Yu Tian. The quasi-second-level acid zombie under her responded. The quasi-second-level zombie zombie's agility was extremely fast surrounding Yu Tian.

The moment he rushed to the attack range, the shell-shaped mouth opened, and clusters of acid liquid the size of a baby's fist continued to draw parabolas and shoot at Yu Tian.

Bang, bang!

The yellow-green acid liquid fell on the floor, and the splashing tiny drops fell on Yu Tian's boots and trousers, making a whispering sound.

Yu Tian's body was flexible and constantly dodging, and his eyes gradually turned into pure reason. At the same time, the murderous intent deep in his eyes was gradually rising.

After the external nightmare virus enters the organism, it has infinite possibilities. Each infection may mutate into completely different branches, so it is almost impossible for the same zombies to appear in a very small area.

Unless... the artificially extracted acid solution of the nightmare virus has been injected into the body of a healthy person, the same type of zombie can be produced stably!

In addition to the fat zombie who appeared before, Yu Tian had almost concluded that the target of Wang Hui's virus extraction of virus protection agents was this third-level acid zombie!

Jiang Huaqiang and Wang Hui threw the silly fat man into their room after injecting the virus, hoping to kill him on the spot.

A rough outline appeared in Yu Tian's mind. It was probably because the female zombie broke free from the shackles in an experiment. Jiang Hua forced the female zombie's thigh with an axe to cover up the two of them to escape. In order to cover up the facts, Wang Hui locked the laboratory and turned everyone into the funeral objects of his experiment!

That's why there are so many zombies piled up there at the door, because they were once living people who could clearly rush out.
Chapter completed!