The death of the super mutants changed the entire battle situation slightly. The attacks of those mutants who were fearless actually paused slightly. Although it was just a slight pause, Chu Hao felt this keenly. Then, under the bombardment of a large number of anti-tank rocket launchers, the death line of mutants, which was already close to the position, was much longer, which made everyone breathe a sigh of relief.

"Wow, two thousand reward points, after I go back, I can also exchange my bloodline." Billis murmured almost with his eyes lit up. After this wave of hot weapons, she was much more courageous, at least now she was no longer the same way she would have fainted at any time.

Although he killed a super mutant, Chu Hao's expression still did not relax at all. This time there were too many mutants. Even if it was conservatively estimated, the number of super mutants was at least about five, so he killed one. Judging from the mental power scan, he had already tried his best to kill the Arctic Continent team. Even if he tried his best, he could kill one or two more. What's the use of this? Those super mutants were not afraid of heavy fire bullets at all. They could rush up. In this way, even if the position was broken, even if they retreated to the final defense line, they probably wouldn't be able to stop these super mutants for much time.

There is still more than an hour before dawn, and it is only about four o'clock in the morning. At least, it has to resist these mutants for an hour, so that they can retreat when dawn comes. This hour... it is really like a year!

The situation at the scene was no longer allowed to think about anything. He could only grit his teeth and continue to command the battle. Where to increase firepower, who needs to replace weapons, and when to use heavy weapons, all of these things were commanded in an orderly manner by him. At this time, even the slowest team members knew that Chu Hao's command level was first-class. It is estimated that only a powerful commander like him could command the battle in this situation.

Fortunately, in the next ten minutes, no super mutant appeared, which kept the death line still like that. So far, the number of mutants who died has exceeded tens of thousands, so I have no detailed details on the specific amount. However, a thick layer of flesh and blood has been laid outside the position. The smell of blood is so strong that it makes people feel that this is in the Shura Field.

And at this moment, Aoqi suddenly spoke, "Chu Hao! There are only two ammunition bases!"

Chu Hao was stunned for a moment and said silently: "Continue shooting, don't stop, listen to my orders!"

Ochi nodded and then continued to shoot, but everyone's heart began to be heavy. The reason why it can still be maintained is because there is sufficient ammunition to support it. Once the ammunition is gone, the subsequent battle will be completely completely lost. Everyone understands this truth, but what if it is understood? This is the reality, and they can only hold on.

Time passed by second by second, and the mutants rushed over desperately. Zhang Heng's Apaqi had already stopped. Nian Xikong was seriously injured and was regulating his breathing. The ammunition and weapons were about to be used up. The firepower suppression of the Arctic Continent team had reached the end. Moreover, even if the mutants died tens of thousands of times, the rest were still rushing towards everyone.

"Let's get more time...!"

Through the mental scanning, we can see that Robert Nefer has been conducting the final test crazily, and I don’t know if it was a coincidence or the time was like this. The end time of his test was just when the sun rose in the early morning. Therefore, whether you have to persist until dawn or get the antidote, you must persist!

When everyone poured out a cardinal ammunition, a tremor vaguely came from the ground, and everyone looked at each other without looking at each other, because this feeling only represents one thing... a new super mutant appeared.

Nian Xikong still closed his eyes and adjusted his breathing, while Zhang Heng shrugged helplessly. His helicopter had long lost ammunition and could not attack even if he wanted to. What's more, he had no way to break the shield of the qi. Even if he used the bullet time, he probably wouldn't be able to break the defense at all.

Everyone looked at Chu Hao, and Chu Hao took a deep breath and said, "Bilis, Ochi, Stry, Tom, Nian Xikong, you start to retreat, return to the final line of defense, and start to garrison there, Zhang Heng, TIER, you and I continue to stay here until their retreat is complete."

Zhang Heng said helplessly again: "Yes, yes, yes, you are the boss, you have the final say."

TIER was expressionless and was very cool and continued to shoot around with two heavy machine guns.

In this way, everyone began to retreat, and when everyone turned to the tunnel, their firepower suddenly dropped a lot, and those mutants who were suppressed and could not find their heads gradually felt this change. Under the leadership of some evolutionary mutants, a large number of mutants began to come crazy and rushed towards the firepower point with no life.

The whole scene looked extremely thrilling. The ground around was already covered with corpses and flesh, and the surroundings were densely filled with mutants. They roared, clamored, and rushed towards everyone desperately, and the firepower could no longer be able to achieve continuous blockade. Although most of the mutants were killed, a few mutants who escaped the net rushed forward.

In fact, this may be the instinct of creatures. The intellectual brain of mutants may not be smart, but there is still a instinct of creatures, that is, they feel that they are stronger than humans. In the past few years, mutants have definitely had a fight with surviving humans who have not yet escaped to the mountains. They naturally know that the guns are actually a great threat to them, but guns that have not formed group firepower, how can they have been able to fight against mutants in complex environments like cities? Moreover, the number advantage is on the mutants' side, so the simple heads of mutants probably also remember one thing: humans are food near the corner.

There were only a dozen mutants who were approaching first. They rushed to the front TIER, while Chu Hao and Zhang Heng continued to shoot around with their expressions unchanged. The first one of these mutants had already roared and jumped up, and they actually tried to jump on TIER's head and bit him to death.

But he saw that TIER did not retreat or avoid it, and rushed up and opened fire near the lifting machine gun. Amid the sound of bullets, the mutant had been beaten into minced meat, but at the same time, several other mutants rushed up, one of the mutants rushed directly to TIER, grabbed TIER's hand with one hand, and tried to lift TIER up.

But that's so easy? I couldn't lift TIER, but was lifted up by TIER. Then I saw TIER throwing down the heavy machine gun and tearing it directly with both hands, tearing the mutant into two pieces. At the same time, I held the mutant's body torn into two pieces, and swept left and right as if I were holding two pieces of weapons. At the same time, I kicked it hard. A mutant's chest was almost kicked through, and it flew ten meters away. It must be dead.

In just over a minute, these ten mutants were killed by TIER, but that was the case. Then when he heard Chu Hao shouting the word "retreat", TIER picked up two heavy machine guns from the ground and ran back while firing.

On the position, Chu Hao and Zhang Heng also hurriedly ran to the big gap in the institute. However, before running, Chu Hao placed the time bomb that had been set before in the ammunition pile. Then the two rushed into the underground of the institute along the rope ladder. Immediately afterwards, TIER jumped from top to bottom. The three of them immediately ran deep into the interior of the institute. It took only a few minutes to run, and there were countless gaps behind them.

The mutants rushed down, but only so many of them were rushing down. Then, a violent explosion sounded from the entrance to the tunnel, and the entire institute was trembling violently. The trembling lasted for a long time. In fact, Chu Hao and others felt that their ears were almost deaf, but when the trembling stopped, they still ran forward frantically. Behind them, the mutants who jumped off the entrance to the tunnel, some of whom were still alive, began to chase behind them.

The number of these alive mutants was only about a hundred, and they were extremely fast and ran forward quickly at the underground of the institute. However, before they could approach Chu Hao and others, there was a fierce sound of gunfire from a distance. The hundreds of mutants were immediately attacked by gunfires. In just a few seconds, they were pierced and killed.

In front of Chu Hao and others, Tom, Ochi and others were holding weapons to shoot here. At the gate of the closed area, the final line of defense was built on this huge metal door.

In fact, the closed area of ​​the institute, especially its gate, is made of state-of-the-art alloy. Although it cannot compete with those nuclear-defense bases and cannot resist tactical nuclear bombs head-on, this alloy gate is enough to fight against various conventional missiles. The last line of defense built by this gate is built, because the number of mutants influx at one time is not large, so it is more tough than the defense line outside the institute... I just don’t know what it is to fight against super mutants.

Chu Hao and the other three rushed to the front, and Chu Hao immediately said: "The gap has collapsed, but those mutants will probably dug the passage hard. We only have a little time to rest. Check all the weapons again, put the ammunition close to you, aim at the end of this passage. As long as any mutant appears, immediately concentrate on the fire and attack, and persist! It is less than an hour before dawn!"

Everyone immediately began to check their respective weapons and ammunition. At this moment, in the final defense line, in addition to heavy weapons, weapons are more powerful penetrating weapons, such as metal storms left behind, such as anti-equipment sniper rifles. Because the terrain here restricts the number and actions of mutants, strong penetrating weapons are more effective.

Everyone was waiting silently, occasionally making a loud breath or two, and everyone seemed to be able to hear their heartbeats. It was too quiet, and the entire institute... it was too quiet.

At this moment, a violent tremor was trembling from the ceiling of the institute outside the closed area, followed by a large piece of metal falling from the sky. Before everyone could see clearly, a large number of mutants emerged from there like rats, followed by the second ceiling falling, the third, the fourth...

"Open fire!"
Chapter completed!