However, Shen Feifei, who had already rushed to the third attack point, knew that it was not the time to be happy, although with everyone's strangulation, the zombies had consumed more than half, but the real crisis had not yet come.

And he knew that the other low-level evolutionaries had already entered a period of exhaustion, and the ability consumption was already relatively serious.

"The Eagle Clan led all the ordinary warriors to retreat to the city wall, the ranged attack evolutionaries also retreated to the city wall, and after the melee evolutionaries were broken, the high-level evolutionaries slaughtered with all their might!" Although the Tie Jun was far away from Shen Feifei, he seemed to be able to feel Shen Feifei's mind, or his overall view of the battlefield was stronger than Shen Feifei's, and he gave a big order in time.

"Heavy firepower on the city wall is prepared, aiming at the dense sea of corpses, and indiscriminately pouring attacks! Fire! Following the order of the Iron Army, Shen Feifei crushed the zombies around him, and then looked at the city wall.

There were heavy machine guns every 5 meters on the two southwest walls, and then there were many members of the Eagle Squad who carried 40 fires on their shoulders and aimed at the sea of corpses.

With the order of the Iron Army, all the heavy machine guns on the city wall opened fire one after another, and the heavy weapons were operated by the members of the Eagle Clan, and they were all trained in the operation of heavy weapons.

I saw a chain of firelight bullets formed by bullets swaying out from the city wall, and each heavy machine gun was attacked in a fan shape, forming a fan range attack, and the zombies under the rain of bullets were instantly torn to pieces by 7.62mm bullets.

Not only first-level zombies, even second-level zombies can't withstand the rain of bullets like a torrent, as time passes, under the strafing of heavy machine guns, the dense zombie group quickly thins out a lot.

Then there were the 40-fire rockets, and with a whooshing sound, the 40-fire rockets dragging the white tail flame poured out wildly, and the target was mainly second- and third-level zombies.

Under the attack of 40 fires, the average second-level zombie only needs one to blast the zombie into slag, as for the third-level zombie, one is disabled and two are killed, which is normal.

This time, Shen Feifei asked Luo Cheng to bring almost most of the ammunition in the base's inventory, which was enough for him to squander, but he knew that just hot weapons were not enough, the protagonist of the battle was always the evolutionary, and there was always a moment when the ammunition ran out.

When all the ranged attack evolvers and ordinary warriors stood on the city wall, the overwhelming attack had just begun, and at this time, with the protection of the city wall and the angle of shooting, the warriors began to frantically attack the zombies rushing in.

And under the city wall are melee evolutionaries, they did not go up to the city wall, because the city wall is the last protection, they must protect the city wall, of course, with the powerful and dense thermal weapons and long-range attack support on the city wall, there are not many zombies who can attack the city wall.

"All melee evolutionaries are divided into two teams, take turns resting and exchanging attacks, and pay attention to regeneration!" The Iron Army's orders sounded like steel.

Without the corpses of the fourth-level zombies, more than half of them were consumed under the attacks of the people, and Shen Feifei began to calculate while dancing the halberd and strangling the zombies.

At this time, there should still be a third of the zombies left, and I don't know if there are more advanced zombies.

But now except for Shen Feifei, everyone seems to be relieved, it seems that Tiecheng has been defended, after all, the ammunition is still sufficient, and with everyone's coordination and cooperation, every heat also has enough rest time, which can restore physical strength and ability.

If this continues, the Iron City should be defended.

Just as everyone breathed a sigh of relief, a strange roar was remembered behind the increasingly scarce group of corpses, and people looked at the earthen wall.

Shen Feifei also raised his eyes to look at the earthen wall, his intuition told him that the real crisis was coming.

The roar was strange, not like the roar of a zombie, more like the roar of a beast, but it sounded very hoarse and gloomy, and most importantly, it gave people a creepy feeling.

Could it be that a higher-level zombie is about to appear?

As figures slowly appeared behind the earthen wall, everyone's mouths opened wide, and some people almost forgot to continue attacking.

What kind of creature is that, more than two meters tall, with a shiny metallic body dripping with disgusting slime, a long pointed head that looks like a human and a lizard, a strange body covered with layers of exoskeletons, hideous bone claws easily tear apart all the zombies in front of them, and the long tongue that spews out is as fast as a bullet, and the power is endless.

The whole creature gives people a cold and evil feeling, but at this time everyone knows what it is, as long as you have watched the movie, there is no one who does not know these cold-blooded, bloody, and brutal guys.

They're aliens!

"Ding, release the trigger mission: Alien Battlefield!"

"Objective: Destroy the Alien Brood."

"Mission time: within one month!"

"Quest Reward: Quest completion rewards 1000 evolution points."

"Quest Punishment: 1000 evolution points will be deducted for failing the quest."

"If the host's evolution points are not enough to deduct, the system will deduct the host's existing evolution points and randomly strip an ability!"

Shen Feifei was stunned for a moment, and actually asked him to destroy the alien brood, within a month, how could he know how strong the alien brood was, go at this time, what if he went to die.

"Ding: The host must eliminate the alien brood as soon as possible, the longer the time passes, if the brood finds more hosts and food, the more and stronger the aliens on the earth, now is the time when the aliens are the weakest, the host should not forget, there are aliens on the earth, think about the consequences if the aliens have a large number of parasitic abilities."

Okay, Shen Feifei nodded silently, indeed, the growth of aliens does not depend on time, but on food, if the alien brood is not eliminated as soon as possible, the earth will be really dangerous.

And then the system is right, the aliens in the movie are just parasitic ordinary people are so strong, if there are a large number of parasitic aliens, superpower aliens, this thing is terrifying to think about.

"You read that right, this is the alien, although they used to be all in the movie, but now I want to tell you that they are real existences, they are all extraterrestrial races, they have descended on the earth, remember one thing, these guys will only be more terrifying than you know."

Shen Feifei's voice was very long, but it made people feel like a chill was rising.

"But don't worry, I believe everyone knows that aliens can be injured by thermal weapon attacks, and now that we have evolutionaries, what about aliens."

In fact, Shen Feifei is just encouraging everyone, he has already learned through the system, the alien is a relatively low-level extraterrestrial race, these guys have the advantage of reproduction speed and number among the extraterrestrial races, and the single attack power can only belong to the bottom of the extraterrestrial race.

But for humans, these guys are terrifying beings, even for evolutionaries, because an alien is born a third-level life, and a mature alien is a fourth-level life, and of course there are more advanced aliens.

The main point is that the growth of these guys has nothing to do with time, as long as there is enough flesh and blood, then they can be crazy and mature.

Shen Feifei finally knew through the system prompts why these aliens drove the zombie hordes to attack the city.

Because Iron City is the closest gathering point to the flesh and blood gathering point of the alien brood that descended, the alien brood should only carry a small number of mature aliens, and the others should mostly be eggs and face-hugging insects.

Whether it is hatching alien eggs or parasitizing by the hugging insects, they need living flesh creatures, and zombies are no longer living flesh creatures before they are fully advanced and matured, so they will come to attack the Iron City, the purpose is the population of the Iron City, to be exact, the host and food.

As for how these aliens drove such a large number of zombies to attack the Iron City, Shen Feifei was still very puzzled, but he had a guess, but he didn't know whether it was accurate or not.

"Don't stop attacking, the alien will give me a high-level evolutionary." Tie Jun looked at the alien who rushed over, and the corners of his eyes twitched.

How many are these numbers, those who know about the formation of aliens know that these more than twenty aliens will need to devour hundreds of people before they can fully grow and mature.

I think the scattered survivors of the alien brood in the southwest have all died, or they have become the hosts or food of these guys.