The rest of the zombies ran away for a while, which made Gu Aotian and Luo Cheng a little confused.

Luo Cheng turned sideways and glanced out from the observation window on the door, but he didn't see any trace of those zombies.

"This is so strange, these zombies are not only very resistant to beating, but also seem to have a little IQ, were they scared away by the fat man I just shot?."

"I guess that group of zombies has also undergone some kind of mutation, and it is very likely to be related to that big boss."

Gu Aotian carefully recalled the scene he had just seen in the aisle, and he couldn't help but shudder when he thought of this.

"Fatty, we have to find a way to get out quickly, or just destroy all the remaining zombies, I have a hunch that those zombies will definitely come back to us."

As soon as Gu Aotian finished speaking, there was movement outside, and then he saw that those zombies had really run back.

Luo Cheng scolded: "I'll take the test, have you opened your mouth?" ”

He hurriedly took a step back, for fear that those zombies would coldly reach out and scratch him.

Luo Cheng raised the sniper rifle again, the bullet was loaded and aimed at the observation window, suddenly, a zombie ran quickly from the door, Luo Cheng fired a shot, and the bullet was stunned to wipe the remaining strand of hair on the zombie's head and then directly broke the observation window of the opposite laboratory.

Luo Cheng: "I'll take the test, so let's move!" ”

Then another zombie ran over quickly, and Luo Cheng's bullet was loaded again, and this bullet was lonely.

Gu Aotian frowned: "Fatty, don't shoot yet, something is wrong." ”

Luo Cheng pulled up the bolt, and the long bullet case was thrown: "This is the hell, these zombies are playing with me!" ”

Gu Aotian: "Don't shoot rashly, if you don't hit, it's a waste of bullets, I feel that these zombies are just waiting for you to finish the bullets you grabbed." ”

"What the hell should I do? We can't be stuck here forever, can we? Why don't you just blow up this group of zombies with a grenade? ”

Gu Aotian shook his head: "It's not proper, if you don't blow up the zombie and blow up this door again, then we are really going to finish the game." ”

"So what do you say?"

While the two were talking, the zombies at the door still flashed over, as if they were provoking them Gu Aotian and Luo Cheng.

In the laboratory on the second floor, Robert and the three of them gathered in front of the screen, watching the surveillance screen.

Cheng Huan: "What should I do?" They seem to be trapped, and they seem to have run out of bullets. ”

Robert had been observing the zombies, and it was obvious that the zombies had already developed some intelligence after sucking the blood of the big zombie, and what surprised him even more was that the big man seemed to be controlling the remaining six zombies.

From the surveillance footage, it can be seen that the big zombie is standing on the wall of Gu Aotian's laboratory, and the position is very tricky, and Gu Aotian and Luo Cheng inside can't see it at all.

Looking at those dangling zombies, Luo Cheng was almost angry, he picked up the sniper rifle and fired two more shots in succession. The first shot missed, and the second shot knocked out only one zombie's ear.

Gu Aotian stopped him: "Don't be impulsive, let them shake, they won't be able to enter the ceremony now anyway." ”

"I'm taking the test, this is simply an insult to the fat man, a great shame! The two of us have become turtles in an urn! ”

"Roll the calf, you're the turtle."

Luo Cheng took out a high-explosive grenade: "If you want me to say that you can blow it up directly." ”

Gu Aotian hurriedly stopped him: "Don't come nonsense, let me think about countermeasures, the other big boss hasn't appeared yet, I don't know where this thing is now." ”

In fact, the big guy was just a wall away from them.

Incredibly, at this time, the big zombie was evolving, and the surface of its body began to grow something like human fat rapidly, and there was a disgusting yellowish mucus on it, and the original layer of skin on its body was slowly burst by this growing thing, and finally the whole body actually became larger again, and the whole process lasted less than half an hour, it was almost three meters high, and it was only twenty or thirty centimeters away from the ceiling.

At this time, I saw that the big zombie turned around and walked towards the door of the laboratory, and the ground trembled slightly with every step, judging from its huge size, it was estimated that it weighed about half a ton.

Boom! Boom! Boom! Boom!

At this time, Luo Cheng had already regained his hearing, and listened to the voice outside the door with a confused expression: "Did you hear it?" What kind of sound is this? ”

Gu Aotian: "I'm not deaf, this voice... It seems to be getting closer and closer to us..."

The next moment, I saw a piece of something that the two of them had never seen before outside the observation window, and there was yellow mucus on the surface of the thing in front of them, emitting bursts of fishy smell.

Robert and the three of them were almost stunned at this time, they had witnessed the whole process of the zombie mutation, and at this time it was standing at the door, and what Gu Aotian and Luo Cheng saw was just one of its legs.

Luo Chengwei shouted: "Spicy guy, I haven't seen any scene of the fat man, I really haven't seen this kind of scene!" What the hell is this!! Could it be that mutated zombie?? ”

Gu Aotian took a step back, and his tone trembled slightly: "That's right, it should be that mutant zombie." ”

At this time, this mutant zombie directly slammed into the door of the laboratory with a fist, this punch was so powerful that the part above the laboratory door that was hit had been cracked, and then it was another punch, and the upper part of the door had been pierced, if it weren't for the chair on top, the door would have been smashed open by it with a punch.

Luo Cheng: "This... What the hell...! ”

Gu Aotian: "It's mutated again, fatty, quick, hurry up and shoot!" ”

This time, Gu Aotian directly urged Luo Cheng.

The fat man was not ambiguous, picked up his sniper rifle and shot out of the window non-stop, and soon, a magazine was finished.

However, apart from the fact that the parts that were not shot were a blur of flesh and blood, there seemed to be no use for eggs.

The bullets from the sniper rifle are embedded in the layer of material on the surface of the zombie's body, which is only a skin wound to it.

The shooting of such a sniper rifle at such a close range was not painful to this mutant zombie, so the two of them gasped for a while.

At this time, the door of the laboratory has been smashed by mutant zombies from the observation window and above.

After the fat man changed the magazine, he continued to shoot at a point, this time the mutant zombie at the door moved a position, and the last two bullets had also been fired, so far, the guns in the hands of the two people had completely become burning sticks.

Luo Cheng took out a high-explosive grenade and said to Gu Aotian: "Brother, don't worry, if you want to die, let's die together." ”

Gu Aotian was anxious: "What a chicken, it's better to keep it to deal with zombies if you have a life, what kind of hero is suicide!" ”