12 hours later

The reason for the increasing pressure on the defensive line is that the artillery barrels of the ground forces have been overheated due to high-intensity continuous operations, but the arrays lined up are destined to move the whole body, which also leads to the fact that the tanks in the front row cannot be moved to the rear for new ones. (Electromagnetic rail artillery can't change the barrel, and in the same way, although the thermal effect of electromagnetic weapons is low, it also depends on the strength, isn't it?) ）

In this regard, Liu Qi's countermeasure is: Since there is no way to retreat, then move forward!

Yes, to launch a counter-charge, the overheated tank in front of the barrel is cooled by artillery, and the whole force advances, so that the tank that has just been put into the battlefield in the rear can fire, but in the marching state, the power and range of the tank's own artillery will be greatly reduced, so it is not a rush forward, but a sectional charge, that is, the first row of tanks advances 100 meters first, and then, the second row of tanks advances, and then goes backwards, and when the whole formation completes the advance, the barrel of the first row is also cooled, so the line of fire is extended again, Strike at creatures farther underground.

The battle in the sky can be said to be the most tight, after all, the three "Silver Wing Radiance" are not completely used for combat battleships, but shuttles, therefore, there are far more guns on the battleships of the same level than it, and now in the face of hundreds of millions of air enemies, although there is no problem for the time being, but after a long time, the all-round stray bullets without dead angles will break the shield, and as soon as the shield is broken, the battleship will be instantly shot down by this group of crazy underground creatures.

"The system saves me!" Liu Qi can only choose to ask for help from the system, but the sad thing is that there is no good way to make the system, the higher power weapons are not impossible to build, but it is useless to build, at the same time, the resource points at this time are also beginning to make ends meet, 5 tank factories and 2 fighter factories are manufactured at full power, and most of the troops that are filled have turned into ineffective firepower, which is a good embodiment in the ground forces.

"Liu Qi, go see if you can build a warship, fighters don't have an absolute advantage in the sky!" Mo Force's voice came.

"I don't know, the battleship factory can't be done, wait, when will it be unlocked?" Liu Qi was just about to refute, his eyes flickered, and he found the battleship manufacturing workshop in a lit state, but this kind of battleship manufacturing workshop has a hopping cycle of up to 20 hours, and now it seems that it is difficult to support it for so long, but Liu Qi still put it down.

In addition, due to the addition of more air units, the ground turret also began to show losses, and the flying insects decided to change their targets after realizing that they could not deal effective damage to the battleship.

"Heavy war machine, the W-1 type has been developed and has been added to the manufacturing list." In the past 12 hours, Liu Qi has spent all his science and technology points to develop this class.

Class: W-1

Parameters: Shield: 200/200

Armor: Sub-overload armor

Weapons: 200mm Scatter Cannon*1, 50mm Concussion Cannon*2, 20mm Nine-Mounted Cannon;

Manufacturing cycle: 30min

Cost: 2000 resource points

The W-1 is a true war machine behemoth, built at a price close to that of the Tejas I, but the power on the ground is absolutely unmatched, at least for now. At the same time, the manufacturing cycle is short, which can be said to be very suitable for the current battlefield.

As a result, the W-1 was added to the manufacturing list, and at the same time, the hard-working EGR-1 work robot was responsible for all the work in the manufacturing, mining, and repair bases.

War is a huge melting pot, and crushing war is a treasure trove of points.

After 30 minutes, the first batch of 5 W-1s joined, which made the frontal battlefield situation turn around!

The humanoid design allows him to attack from behind the defensive line, and he can appear in a high and low position, which is an advantage of its layout over the tracked type.

"All the troops are attacking!" Liu Qi decided to launch a counterattack, if the light to maintain the defense line, it is not a long-term solution, because there are too many enemies in the air, he strives to push out the frontal defense line, and then produce more W-1 to defend the air, its huge 200mm range scattering cannon is even better than the attack effect of the particle cannon, because most of the underground creatures in the sky are flying insects, and the number of giant flying insects is limited, so you can hand it over to the turret to extinguish.

Twenty hours have passed, and the resources in the base have almost been exhausted, but the appearance of two new buildings has served as a shot in the arm for the base.

1. Battleship manufacturing workshop (mentioned earlier)

2. Biomass furnace (decompose biological corpses to obtain resources, here to add, "Aeolus α" organisms have a certain amount of zero element content in their bodies)

Although the corpses of the ground defense line could not be picked up, but, there were not a few corpses that fell from the sky, so the EGR-1 robot had a new job.

The veins in the canyon are too deep and the mining cycle is too long to keep up with the rate of consumption.

"Let me see what the battleship manufacturing workshop can make~" For the long battle, Liu Qi was already numb.

1. Small support frigates of the "Storm" class.

2. Medium attack frigate of the "Thunder" class.

3. "Tianjue" type incandescent particle artillery test ship.

In the end, Liu Qi chose the "Storm" with the shortest manufacturing cycle, although the weapons supply is limited, but its medical ship similar to Star II, in this way, the number of tanks in the frontal battlefield can be gradually reduced, replaced by infantry, thereby strengthening the diversity of the firepower network, and can also assist in air defense.

- Underground Creatures Coalition -

"Gollum, isn't the boss here yet?" Afinia asked.

"The Boss is still on the way." The leader on one side said.

"!" Kayzac said irritably.

"The development of "bioinhibitors" has been completed!" Liu Qi heard the real nature, yes, this is genetic engineering, from research and development to completion, it took 20 hours, this kind of medicine, for underground creatures, using the genetic fragments of those corpses for targeted development, it can be said that the battlefield is now on, Liu Qi is dominant!

Soon, the first batch of "Yinglong II" fighters carrying "biological inhibitors" took off and went to the enemy's military formation, acting as "pesticide sprayers". Because all the flying insects and giant flying insects were entangled in the sky battlefield and couldn't get out, this batch of fighters was unimpeded and sprinkled "biological inhibitors" in the center of the enemy army, and soon the medicine took effect, and a large number of underground creatures died, and the casualties caused this time were greater than the damage caused by the bullets.

And the underground creatures have a habit similar to the cockroaches on the earth, that is, they devour the same kind, and therefore, the "biological inhibitors" spread further, and the army of tens of billions of underground creatures evaporated more than half of them day and night, and even the leader was recruited, but it was only weak, and the residual "biological inhibitors" were not enough to kill them.

So, the horn of the counteroffensive sounded, and a large number of "crusader" chariots set off with "biosuppressants" and "fungus blanket removal solution" to clean up the world.