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……

In an oval-shaped room like an egg, Lin Fei operates the 'computer' of the engineer family. This kind of operation technique was specially trained when he was on the U-shaped spaceship, so Lin Fei was quite comfortable at this time.

As more information emerged from the hologram in front of him, a smile appeared on the corner of Lin Fei's mouth. If nothing else, the 100 Engineer survivors lie deep beneath this structure.

Although the aliens have evolved to four generations, their IQ is obviously not enough to understand this kind of high technology, so the scientific and technological equipment of the entire building is working normally, and through the inquiry, Lin Fei saw that there are 100 normally operating life support cabins underground.

What this means is already self-evident.

It's just that how to go underground made Lin Fei worried.

In front of the elevator passage leading to the underground, there were many aliens, among which there were seven or eight fourth-generation aliens, and it was definitely unrealistic to break through, because Lin Fei noticed that there were a large number of fourth-generation aliens in this building, especially near the passage. According to the virtual image scanned by the whole building structure, the building is divided into 32 floors above ground and 16 floors underground, and in the area of the 16th floor underground, except for the last 3 floors, there are no signs of alien activity, and there are a large number of fourth-generation aliens on the other floors.

The elevator system has long been destroyed by aliens, and the elevator shafts are full of aliens that are more flexible than geckos. In other words, if Lin Fei wants to go down, unless he kills all the aliens here, don't even think about it.

It's just that to do this, even if there is an alloy alien queen, it will take a long time, after all, no matter how powerful the lion is, if it is facing thousands of hunting dogs, it will also be killed.

Previously, the Alloy Alien Queen had dealt with two fourth-generation aliens at the same time, and although the result was a successful killing of the other party, there were also some scratches on its body, which made Lin Fei realize that the Alloy Alien Queen was not invincible. There are seven days left in the mission time, which is not long or short. If you want to kill layer by layer, this time is probably not enough, but if you trigger the aliens from outside to come for reinforcements, there is no hope of rescuing the survivors of the engineer clan.

So Lin Fei thought about it. I think the best way is to go underground without alarming the aliens, as long as you are sure that those survivors are below, you can contact the companions above to temporarily lure away the aliens, even if they are hit layer by layer, it is much safer than from top to bottom before.

Thinking of this, Lin Fei summoned Alice and asked her to disperse the Alloy Alien Queen. Lin Fei then dispersed Alice.

Because of the structure of this huge building, Lin Fei knew that there were some small shafts here, which should be used for ventilation, and after checking the size of these passages, Lin Fei found that the diameter was more than one meter, which was enough for himself to enter.

Lin Fei found a shaft entrance that could directly access the 16th floor underground, opened the lid and looked at it, and it was pitch black inside. It's pretty safe. So I took a deep breath and got in.

This kind of hoistway does not lead in a straight line to the bottom, but has a curved bend in each layer. It's kind of like a ventilation duct in a human building. And even if Lin Fei found such a passage, he would need to be extremely careful, because a lack of attention would lead to terrible consequences.

The above floors are relatively smooth, but after entering the basement floor, there is some trouble.

Aliens obviously also like the underground environment, and the number of aliens in the underground is even more, and Lin Fei remains stealthy even in the passage, because this can force himself to slow down. While crawling through a horizontal passage, Lin Fei saw a small hole in front of him that resembled a vent. Some noisy sounds came in from there, and Lin Fei was curious, and looked down through this opening, but he held his breath. …,

There are all four generations of aliens below, and there is even a huge alien queen, with a total number of more than a hundred. Lin Fei was very sure that if he was exposed at this time, he would definitely not be able to escape. Because it is impossible to fly here, the alien is more suitable for fighting in a relatively small space than itself, and the most important thing is that there is only one person, and there are many aliens.

Therefore, when climbing through this section of passage of about thirty meters, Lin Fei can be said to be extremely cautious, the slightest noise may bring death, or even a slightly heavier breathing.

Carefully crawling through this section of the passage, Lin Fei didn't have time to breathe a sigh of relief, but he felt a rustling sound behind him. Lin Fei looked back and saw that in the corner of the passage more than thirty meters away, an alien showed half of its head.

"Damn, there's no mistake!" Lin Fei scolded secretly, but hurriedly crawled forward, but fortunately, there was a corner in front of him, and Lin Fei hurriedly dodged to the side.

This location is a 'T' shaped intersection, and the side where Lin Fei is located is a dead end, which means that if that alien has to go around, Lin Fei really has nowhere to hide. Now, Lin Fei is holding his breath and hiding in this corner, if he doesn't move in the sneaking state, others won't be able to spot him at all, as for whether the alien can or not, then Lin Fei doesn't know.

Below two or three meters away, that is, at Lin Fei's feet, there is a large group of fourth-generation aliens who can kill Lin Fei, obviously they can't be alarmed, so Lin Fei can't do anything to this ordinary alien passing by, although the current Lin Fei can kill it with any move, but that will alarm the aliens below.

After waiting quietly for a while, Lin Fei saw that the alien slowly crawled over from the front, to be honest, Lin Fei was quite nervous now, and the source of the tension was actually brought by a alien sapper with a combat power of less than 300, as long as the other party found out, it meant that he could only flee for his life.

In just a few seconds, it seemed to Lin Fei that a long time had passed, but there was no such thing as a bloody alien pounced in this process, and the other party quickly crawled through this passage, and Lin Fei waited for the other party to walk away before starting to move.

Although he escaped this catastrophe, Lin Fei knew that the current situation was a little troublesome, and he originally thought that there would be no aliens in this passage, but now it seems that his previous inference was obviously wrong, but it is unrealistic to retreat from the original path at the moment, and there is no place to hide if he encounters one more on the way, and Lin Fei is also a master who does not believe in evil in his bones, so he immediately made a decision and continued to move forward.

However, on the next journey, Lin Fei had to be more cautious, not only to be careful not to alarm the four generations of aliens outside, but also not to let the alien patrols in the passage find out.

This kind of alien in the narrow passage is obviously smaller, so Lin Fei called them alien 'patrolmen', but in fact, there is not only one alien patrol in the passage. When Lin Fei sneaked all the way to the third floor underground, he had already encountered no less than 5 alien patrols, of course, these five times Lin Fei was terrified to deal with the past, but he was not exposed. This undoubtedly improved Lin Fei's stealth ability to a new level, and his ability to breathe, control his breath, and even use some terrain and other means to assist in hiding has also improved a lot.

And soon Lin Fei knew how wise it was not to rush down with force.

Because after the third basement floor, Lin Fei saw a new alien form. It is a slightly smaller alien, about 1.8 meters tall, closer to a human in appearance, and no longer has the protection of an exoskeleton, but has been replaced with an outer skin like human skin. In addition, there is a knuckle-tail-like thing at the back of their heads, which is pitch black and three meters long, like a whip, and like a poisonous snake, this whip-like thing is extremely flexible, it should be the weapon of this alien, and this alien should be the five generations of aliens. …,

Lin Fei checked it with a combat power probe and found that the combat power of the five generations of aliens was the same as that of the four generations of aliens, and there was a clear gender distinction, which was obviously another step in evolution.

Continuing down, it took Lin Fei more than ten hours to enter the thirteenth underground floor, but after arriving here, Lin Fei found that there was no road in front of him.

The passage was blocked by a metal that seemed to melt and solidify, and it was impossible to pass through it at all. Lin Fei thought about it and knew that the sixteenth underground floor, the last three floors had not been invaded by aliens, which showed that the engineer clan had blocked all the roads into the fourteenth underground floor when they retreated, including this small ventilation duct.

If so, it's really a troublesome thing. Lin Fei slowly retreated, and then found a place without aliens on the thirteenth floor underground and climbed out.

To be honest, after more than ten hours of high-intensity crawling, and always lying in his body, even Lin Fei's physique inevitably had some backache. After a little movement, Lin Fei explored the entire thirteen underground floors.

The density of aliens here is obviously not as dense as the upper layers, but there are also hundreds of fourth-generation aliens and fifth-generation aliens, and the main passage into the next layer is sealed by a metal door that I don't know how thick it is, and the metal door doesn't know what material it is made of, it is actually a strong acid blood that is not afraid of aliens. Judging from the scattered xenomorph corpses in front of this metal door, it is obvious that xenomorphs often use strong acid to corrode metal doors, but they should have failed.

The alien can't be opened, Lin Fei naturally can't either, and Lin Fei can't use the ability of the crow body to enter through the door, who knows how thick this iron gate is? In case it exceeded three meters, Lin Fei might pass directly into the iron gate.

The Engineer's last hideout is indeed impregnable, and there is no attempt to enter from the outside, so the only way to enter is to have the people inside open the door.

Next, Lin Fei very carefully summoned Alice, so that she could summon the Alloy Alien Queen. Under this kind of battle, Lin Fei didn't intend to let Alice put her life in danger, and with Alice's current combat strength, she couldn't help Lin Fei at all. (To be continued.) If you like this work, you are welcome to (.) to vote for recommendation, monthly pass, your support is my biggest motivation. )