Open the Resource Center

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【Resource Center】

Energy core: 252

Common Resources: 4007

Special Resources: 427

Towers: 36/48

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【Research Center】

Secondary Machine Gun Tower (buildable)

Level 2 Flame Tower (buildable)

Level 2 laser tower (buildable)

Secondary Cannon Turret (buildable)

Shock Tower (buildable)

Control Tower (buildable)

Remote turret (developed in 36 hours)

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The R&D Center can develop two to three different types of defense towers at a time, in order of difficulty: first develop defense towers with a low technical level, and then develop a higher technical level.

However, the multi-threaded R&D model adopted by the scientific research center will lead to the sluggishness of the R&D speed of a single defense tower, the resources are limited, and the efficiency will be reduced a lot if the stall is expanded.

Therefore, Lu Wei and Kai discussed it and adjusted the scientific research method of the defense tower, turning the research and development of multiple defense towers at the same time into one research and development at a time, and concentrating resources, so that the research and development efficiency cannot be said to be greatly improved, but for the defense tower that Lu Wei needs, it can be developed relatively quickly.

For example, the long-range artillery tower, which is followed by a second-stage shock tower, a second-stage control tower, and a missile tower, can choose one or two for parallel research and development, but the research and development takes a long time, so Lu Wei aborted the research and development tasks arranged later, and first made every effort to develop the powerful long-range artillery tower.

Because the scientific research center developed the second-level cannon turret that Lu Wei was looking forward to, he looked at the information of the second-level cannon turret.

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【Secondary Cannon Turret】

Upgrade cost: 200 normal resources + 50 special resources

Direct Construction: 320 Normal Resources + 65 Special Resources

Description: A powerful but slow rate of fire twin cannon turrets capable of striking single intruders, but not enemies at close range

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In the description of the secondary cannon turret, only the word "double" is added, that is, the barrel of the cannon has changed from a single barrel to a double barrel.

The firepower has doubled.

Not only that, but because of the use of a new and more powerful shell, the second-level cannon turret has been increased by about 25% compared to the primary one, and it has a more terrifying attack power against monsters that invade the base.

Lu Wei thought about it, now in the base, the weapons that can inflict heavy damage on elite monsters, except for the laser tower, I am afraid that there is only the cannon turret.

The fatal flaw of the laser tower is that it does not have any lethality against the shielded monsters, so it is better to invest all resources in the cannon turret to upgrade the firepower and power to deal with the threat of monsters outside.

In one breath, Lu Wei upgraded the eight cannon turrets near the entrance of the passage to the second-level state!

There are a total of sixteen cannon turrets on the defensive platform, and Lu Wei originally wanted to upgrade all of these cannon turrets to level 2, but the special resources are insufficient, so he can only upgrade half of them.

"Kai, you're ready, let the monsters in."

"Understood!"

The gate of the base opened, and a large number of monsters rushed into the base.

Flame towers, machine gun towers, and cannon turrets fire fiercely, and the Reapers, these fierce monsters.

"Boom!"

"Boom!"

The cannon turret, which had just been upgraded to the second level, made a bombardment sound similar to that of a naval gun, and the sound of the metal and the cannon chamber hitting was extremely crisp, and the monster that was hit flew high under the impact of the huge inertia of the cannonball, and its body was shattered into several pieces.

Lu Wei's eyes have always been on the high-level monsters, especially the [Uninvited Guest] that Kai said and the [Snail] who took the three energy cores last time, which have become the objects of his focus.

After seeing the swaggering, like a tank, the uninvited guest entered the base, Lu Wei's spirit was shocked, and he hurriedly said: "The uninvited guest has come in, Kai, give me a hard beating!" ”

"Understood!"

Kai controls two secondary cannon turrets, and after aiming, he fires four high-velocity shells in a short time.

"Bell!"

"Bell!"

A scene that shocked Lu Wei appeared, after the four shells hit the uninvited guest, two of them were directly bounced off, and two of them only left two shallow marks on it.

"Damn, the defense is so strong? Kai, keep fighting, increase the density of firepower! ”

The four cannon turrets are aimed at uninvited guests and are ineffective.

Six cannon turrets plus three machine gun turrets, nullifying.

It wasn't until this uninvited guest walked to the middle of the defense platform and walked under a laser tower that Lu Wei finally saw a little effect.

The laser burn, which lasted for five seconds, left a shallow hole in the uninvited guest's body and began to burn.

The laser tower works.

After the uninvited guest passed by the four laser towers, it had four more terrifying holes in its body, one of which pierced it, igniting a raging fire, coupled with the continuous blows of the cannon turret, the uninvited guest finally couldn't bear it anymore and fell halfway.

"Finally dead."

Lu Wei breathed a sigh of relief, "The armor defense of the uninvited guest is very strong, but because there is no protective shield to protect it, it still can't stop the burning of the laser tower, which is the nemesis of all shieldless monsters." ”

At this moment, the snail that took the three energy cores of the base last time also walked into the base.

After a few days, the size of this snail was significantly larger than that of its kind, and the protective shield outside the body was larger and thicker, like an invisible fortress.

"Kai, concentrate your firepower and destroy this snail!"

For monsters with shields, fire attacks can achieve better results!

Kai mobilizes four secondary cannon turrets and four primary cannon turrets and fires at the same time!

Boom Boom!

After the snail's shield was hit by the shell, a large ripple appeared on the surface, and the shape became extremely unstable.

The snail obviously didn't expect it to encounter such a fierce firepower, and the protective shield almost collapsed.

Lu Wei was also very surprised, the cannon turret upgraded to the second-level state, with only three shots, could defeat the shield of an ordinary snail, but this snail withstood more than ten shells, and the protective shield had not yet dispersed.

"The energy core can enhance the ability of the monster, this snail has gained much stronger strength from the energy core than its kind, this increase may be three, five, or even ten times, I must increase the attack power!"

The ten cannon turrets rotated the turrets and fired at the same time, and the protective shield of the snail exploded in an instant like a glass cover! But less than half a second later, the screw immediately opened a new shield, much smaller in diameter, and could only protect itself, exposing the allies it had previously protected within the shield.

"There are a lot of energy reserves in the snail's body, and only continuous attacks can completely defeat its shield."

"Keep fighting, I don't believe you can't extinguish it!"

Boom Boom!

Bump Bump Bump!

Dense shells and bullets poured on the snail's body, even if it would find some dead spots to stop and rest for a while, but now there are defense towers built in all corners of the defense platform, there are almost no dead ends, and the snail can withstand attacks from all directions, and it can't make an inch.

However, a scene that surprised Lu Wei appeared again, the snail gave up the plan to steal the energy core, dodged the attack, and ran out of the base in disgrace.

"I'll rub it, this snail still knows how to retreat as advance and protect himself?"

"Its IQ is estimated to catch up with humans!" Lu Wei was surprised.

"It should come back and we'll see it again." Kaidao.

"If you come again, don't think about running again, its luck won't always be good!"

The gate of the base was closed, and this wave of monsters was completely wiped out.

Lu Wei was very interested in the corpse of the dead uninvited guest, said hello to Kai, took the elevator and ran down, and came to the charred corpse of the uninvited guest in a T-shaped section.

"It's so hard!" Lu Wei kicked the corpse of the uninvited guest a few times with his foot, but the corpse was not damaged, but his leg was shocked and painful.

Lu Wei picked up a cannonball shell case from the ground again, knocked it on the armor of the uninvited guest a few times, lifted the four or five pound shell and smashed it hard, making a "bangbang" sound of gold and iron fighting, but the result still couldn't leave a mark on the uninvited guest's body.

The boss with the strongest protection is not called in vain, and the protection of the armor of the uninvited guest is probably a fight with the composite armor on the earth tank.

"The caliber of the cannon is 75mm, the warhead is thicker than a human wrist, and the power should be about the same as the average 75mm tank gun, or even stronger...... But this kind of cannon can only leave a shallow mark on the armor of the uninvited guest, how strong is its defensive power? ”

If this kind of armor is made into armor and armor, it can be cast into a blade and used in the industrial field...... What is it worth?

"The armor of the uninvited guest is too solid, let's see if I can take some out and study it."

Lu Wei wanted to take some materials from the uninvited guest, but the uninvited guest's whole body armor was too strong to be broken at all, so he could only break off a barb that had been broken most of it from the corpse's leg, this barb was about twenty centimeters long, with a sharp tip, and the inner ring in the middle had many serrations that emitted silver light, like a death sickle.

Satisfied, he put the barb into a plastic bag, and Lu Wei returned to the bedroom.