The Shadow Fortress, which had been quiet for a while, sounded its sirens again, and the blinding pillars of light pierced the night and focused in the direction of the main entrance.

A chariot roared out of smoke and dust, rushing towards the fortress at full speed, and two strange beasts were hanging from its hull. The fortress guard tower immediately burst into gunfire, and a rain of bullets swept across the main combat vehicle. Of course, these large-caliber machine gun shells can't penetrate the armor of the tank, but they can kill the alien beasts hanging on it.

More chariots appeared, rushing towards the fortress.

The gates of the fortress slowly opened, allowing only one chariot to pass through.

At the end of the chariot unit were several battle mechs, which shot as they went, constantly blocking the large tide of beasts in the rear.

Suddenly there was a roar of artillery in the fortress, and all the heavy artillery was firing, forming an interception barrage less than fifty meters behind the mech. A heavy cannon at the highest point in the center brewed for a long time, and then spewed out a cloud of ionic plasma that shimmered with a faint blue light.

The plasma mass fell in the beast tide, instantly evaporating all the war beasts within the heart of the explosion. The war beast next to the core area was also crawling with electric sparks, and it fell to the ground. But the lethality on the periphery is much worse, and many war beasts are still running against the electric fire. On Planet Four, the last thing they fear is electricity and acid.

The fire interception of the fortress still kept the beast tide at bay, and under the cover of the fortress's fire, the remnants of the troops were able to withdraw to the fortress. The tide of thousands of beasts that pursued them still refused to give up and continued to attack the city, and then they were torn apart by the defensive fire of the fortress.

In the central square of the fortress, Joseph stopped the mecha and jumped out of it. William also got off the mech, but when he landed, his body shook and he almost fell.

Professor Herman hurried over, taken aback, and asked, "How so?"

"We were attacked halfway through. William said.

"But it's only a few C-rank beast tides chasing you, how can the losses be so big?"

Joseph smiled bitterly and said, "Remember how we killed those assembled beasts when the Cambrian was just installed a few days ago?"

"Of course. ”

"That's what they do. ”

"What?" Herman couldn't believe his ears.

William said, "Okay, let's treat the wounded and repair the equipment first." In addition, send a message to the Legion's outer space base that we need a lot of anti-aircraft weapons, especially anti-missiles. ”

"Is it really a missile?"

"Biomissiles. ”

Herman's face turned pale and he hurried away, and William and Joseph looked at each other with solemn faces.

At base 2, Chu Jungui held a huge bullet box and inserted it into the anti-aircraft gun tower. This batch of sniper rifle-based anti-aircraft turrets has a low rate of fire and does not require high ammunition reserves. Therefore, Chu Jungui specially developed a large cartridge box with a capacity of 50 rounds for the gun turret. Using a cartridge box can significantly increase the speed of the turret aiming movement and increase the range of fire.

After loading the bullet box, Chu Jungui loaded a bullet, and then stretched his body.

Not far from the base, two tractors were moving. From the top of the base, they have turned into tiny clusters of light. On the night of Planet Four, each ray of light means a living companion and a warm presence.

At this moment, the distance between the two sides has exceeded the range of communication, but Chu Jungui knows that it is Lin Xi, and he also knows what is on the tractor behind her.

Just past 1,000 meters, Lin Xi stopped and began to plant fusion explosive devices with several fighters.

Chu Jungui shook his head helplessly, although the yield of these fusion bombs was only a few tons, there would still be a lot of aftermath at a distance of kilometers. And this kind of transformation, what exactly is the equivalent is difficult to calculate, there will be a considerable error, it may be 2 tons, or it may be seven or eight tons.

He picked up the magazine box and was walking to the next gun tower, when suddenly out of the corner of his eye, he swept an anomaly!

Chu Jungui turned his head and saw a group of black dots in the distant sky rapidly approaching!

There was no need for the helmet monitor to adjust the field of view, Chu Jungui automatically focused and saw the appearance of the incoming object clearly. He immediately activated the base alarm and shouted in the communication channel: "All attention, prepare to defend against missiles! Missile position: 737,412." ”

Missile?

Many of the fighters didn't understand what was going on, how could there be missiles in this damn place, but some of them blurted out quickly: "It must be the Shadow Fortress that is coming again!"

The soldiers suddenly realized and rushed to their posts at full speed.

Lin Xi outside the fortress also discovered that the enemy was coming. She didn't panic and programmed the tractor to run automatically. The tractor turned on all the lights and rushed into the distance at full speed. Lin Xi then ran to the base with a few soldiers, and turned off all the lights at the same time.

Chu Jungui took over control of all anti-aircraft gun towers, as well as a part of the automatic gun towers facing this direction.

There were 60 missiles in total, and they were clearly visible at the moment. Seeing their constantly expanding and shrinking bodies, even the test subjects were shocked, could it be that these missiles were all alive?

No matter what came to them, Chu Jungui would not let them approach the base. He quickly locked onto the target, and as soon as the missile group came into range, all the anti-aircraft turrets immediately opened fire at the same time.

The head of a missile flying at the front suddenly exploded, and it immediately lost its target and flew around in the air. More than a dozen other missiles were also hit, some exploding in the air and others falling headlong into the ground.

"Hit 17 shots, a bit less. "Subjects were not satisfied with the results.

At this time, the disadvantage of the slow rate of fire of the anti-aircraft gun turret appeared, and by the time the reload was completed in three seconds, the missile group had already flown from 5,000 meters to less than 2,000 meters.

In the second round, the interception effect increased, and 20 rounds were all hit. However, the missile group is still half.

Two satellite bases have already opened fire, and the fighters control remote-controlled turrets to intercept. However, the missile flew extremely fast, the target was small, and it was not moving at a uniform speed, but was propelled by jets when it was expanding and contracting, so the speed was fast and slow, and almost all the intercepting fire was empty, and only Rose shot down two in a row.

The automatic gun turret controlled by Chu Jungui finally opened fire, hitting most of the targets in an instant. Chu Jungui deliberately placed the target within a kilometer to increase the hit rate, and at the same time grasped the moment before each target's body was about to expand to the maximum, which was also the time when they flew the slower. With Chu Jungui's archery skills, he naturally would not let go of this opportunity.

However, after several missiles were hit, they suddenly exploded in the air, and the shock wave pushed the other missiles around them away, and also made the gun tower controlled by Chu Jungui on the ground empty.

"Oops!" Even the test subject did not expect this to happen, and immediately controlled the movement of the turret to intercept it. Moreover, the movement of these missiles in the shock wave also became irregular, and Chu Jungui fired one after another, but all of them missed.

A total of four missiles broke through the interception fire net and flew over the base!