The red-eyed zombies that were charging frantically down the stairs were dying in front of the barrage of bullets fired by the soldiers, but soon more zombies filled in.

These fearless zombies bring a never-ending heavy pressure to everyone.

Over time, the number of deaths in the ranks continued to increase.

This kind of battle between humans and zombies is extremely cruel, there are only the dead and no wounded, because being injured means being infected, and there is no other choice but to commit suicide or be killed by comrades.

Li Nan, who was observing the battle situation, had already noticed that dozens of meat chrysalis had formed on the stairs, whether it was a bone shield zombie that was about to hatch or a porcupine zombie that would spray bone spurs from a distance, it would bring a heavy blow to the team, and it seemed that only entering the thirty-sixth layer of defense was the best choice now.

The number of casualties among the soldiers was still increasing, and Xie Wa, Parker and others around Li Nan suggested one after another: "Captain, let's go into the corridor to defend!" ”

Li Nan refused with a tough attitude: "No, wait!" The choice that the enemy wants us to make must be the worst choice. Hold your ground and wait for Quint to finish his inspection! ”

After another five minutes, the bone shield zombies and porcupine zombies that hatched from the meat chrysalis began to attack, and the overwhelming sharp bone spurs shot at the soldiers, killing and wounding them for a while.

At this time, Quint finally finished checking the corridor with an instrument, and he came to Li Nan, who was fighting fiercely, with an ugly face: "There are at least three terrible mechanisms in that corridor, I'm sorry, I can't crack it in a short time." ”

Hearing Quent's words, Li Nan's brain raced quickly, and after a few seconds, he ordered, "Demoman, go and blow up that hallway!" ”

The more complex and delicate things are, the easier they are to break, and since there is no time to crack the mechanism in the hallway, the only way to try it is to take the most direct and violent way.

The Demoman who had received the order came to the broken gate and threw explosives inside, and as the first wave of explosions sounded, discs of black barrels appeared on the ceiling of the metal corridor every few meters, they looked like automatic water sprinklers, but instead of clean water, countless large-caliber bullets were sprayed.

In addition to the machine gun discs that can cover the entire corridor, lasers that are constantly changing shapes also appear in the corridors.

Looking at this unusually familiar laser trap, Chris clenched his fists tightly, when he was in the hive, many of his comrades around him were cut into pieces by this laser trap.

Seeing the entire corridor swept back and forth by the fishnet-like laser, everyone figured out the enemy's combat intentions at this time.

The onslaught of these zombies, regardless of casualties, is to make everyone unable to bear the pressure and retreat into the corridor full of traps, and then all the people will be wiped out, and maybe the first few action teams that came to seize the virus strain died here.

All the people who were anxious to enter the corridor just now, after thinking about these things, their faces turned pale, and their hearts were full of fear, if it wasn't for Li Nan seeing through the enemy's plan, then the corridor would definitely be full of minced meat now.

Time was pressing, and Li Nan motioned to the Demoman to increase the power of the bombs and blow up the traps as soon as possible.

The first two traps were blown up with an increasingly violent explosion, triggering a third flamethrower rising from the ground.

When the bone shield zombies on the stairs took cover in front and kept approaching the soldiers' positions, Quint's excited voice finally came from Li Nan's ears: "All the traps have been cleared, and the door at the end of the corridor has also been blown open!" ”

Hearing this, Li Nan hurriedly breathed a sigh of relief, and hurriedly ordered all the soldiers: "Everyone fight and retreat, stabilize the formation, and retreat to the corridor on the thirty-sixth floor!" ”

When the soldiers all withdrew to the corridor, the swarming zombies were not too threatening, as long as dozens of soldiers kept firing, they could completely hold the stairs in front of the gate.

With this perfect defensive terrain, even the bone shield zombies can't withstand the concentrated fire attack of the electromagnetic gun, and the porcupine zombies with long-range attack ability will be killed by the snipers in the team as long as they dare to show their heads.

Glenn, who was hiding in the shadows and commanding the zombies, also seemed to realize that if the zombies continued to attack, they would only be killed by the soldiers in vain, so soon the zombies stopped this senseless charge and disappeared into the various floors again.

Although they knew that these zombies would still be intercepted on the way back, Li Nan and the others, who had not yet obtained the virus strain, could only choose to continue to move forward and carry out this increasingly dangerous mission.

After a fierce battle on the stairs, more than forty soldiers died, and Li Nan still had a team of 160 soldiers.

After checking the air quality with a machine, Quint said, "There are no leaks of dangerous gases and other viruses on this level. ”

"Well, that's kind of good news." After Li Nan informed everyone, he quickly took off the mask that was a little stuffy and took off the protective clothing that made people feel bloated.

As usual, three reconnaissance teams of ten soldiers were sent to explore the way ahead, and all of them entered the 36th floor of the experimental center.

Everyone walked vigilantly in a wide corridor, flanked by isolation laboratories made of a whole surface of special glass.

Through the glass, you can see that in the isolation laboratory, there are some unnamed electronic instruments and stainless steel operating tables, and some rooms are also placed in culture cabins of various sizes.

Those cultivation cabins were filled with blood-red and yellow liquid, some similar to the yang water in the human placenta, Li Nan looked at it carefully, and seemed to be vaguely able to see that there were some extremely strange organisms soaked in them.

"Help! Help me! Dada......da

Just as everyone was walking slowly, the mournful cries for help and fierce gunfire of a reconnaissance soldier suddenly came to mind.

Li Nan and the others hurriedly ran in the direction where the voice came from.

When everyone came to the vicinity, they saw a soldier holding his neck with his hands, blood constantly flowing from his fingers, and the other nine soldiers shot in all directions with fear on their faces, the instruments and training cabins in the room were damaged, and the ground was full of disgusting red and yellow liquid.

"Stop attacking!"

Chris stopped their attack and hurriedly asked, "What's going on here?" Have you been attacked? ”

Seeing the arrival of reinforcements, the nine frightened soldiers finally had the confidence to stop firing.

The leader of the reconnaissance team relieved his mind and described: "Our team has just walked here, everyone is scouting around, Jerry was suddenly bitten by something in the throat, but we can't see the enemy, so we ......"

Parker, who was holding a heavy machine gun, looked around suspiciously and said, "How is this possible for an enemy you can't see?" Are you mistaken? ”

After carefully inspecting the surroundings, Li Nan said in a very certain tone: "They are not mistaken, the enemy is indeed a child who can be invisible, or a mutated zombie that looks like a child. ”

"How do you know?" Parker clearly didn't quite believe Lee's words.

Li Nan pointed to the puddle of yellow liquid flowing on the ground from the broken culture cabin: "Look here." ”

Everyone looked at each other, only to see that near the pool of viscous and disgusting liquid that Li Nan was pointing to, there were a few small footprints stained with liquid, and judging from the size, these were indeed children's footprints.