My different world is game mode.

Chapter 638 Underground Fortress
"what?"

Lindsay herself was not expecting this change.

As for the [Survival Construction] module, apart from daily use, there is actually no other way to upgrade it.

What I want is to let it develop freely in the future, for example, relying on the rewards from the [task bar] to increase the skill level.

But never expected.

At this time, he didn't do anything big, and the [Survival Construction] module upgraded itself!
"..."

Lindsay calmly analyzed the current situation.

Then, a possibility came to mind.

In the wasteland world, he has completed the construction of two cities, the [Forest City] and the [Zerg Nest]. Together with the [Underground Fortress] in front of him, there are three cities in total.

What about the [Survival Construction] module?

Survival and construction are equally important things.

After completing the construction of three cities, this module finally hit a certain limit, leading to its upgrade.

"This time we are building three cities, but what about next time? What should we do next?"

"Dyson Sphere Program? Factorio?"

Lindsay shrugged.

He smiled, opened the properties panel, and began to check this sudden surprise.

【Automation System: Unlock automation facility technology.

Note: In the later stages, there are hundreds of farmlands and dozens of farms! Players also need to go fishing. It is impossible to spend all day fishing on this! 】

"..."

Lindsay's mouth twitched.

There seems to be nothing wrong with this thing, and it also fits the habits of survival players.

But when he thought back to his adventure, he always felt mocked by the annotations of the skills.

Then, Lindsay opened the panel of the [Survival Construction] module.

Some interesting new names come into view:

"【Automatic watering machine】【Automatic harvester】【Automatic refiner】【Conveyor belt】【Solar generator】..."

Lindsay checked them one by one.

The introduction of these items, just like their effects, requires no human operation at all and can work automatically after being manufactured.

The only problem.

The construction of these things requires high-level ores.

Even though Lindsay has accumulated a lot of resources in the past two years, it is impossible for him to equip the territory with all these things endlessly.

"But as long as you complete one set, there will be a steady flow of supplies."

Lindsay's trip happened to be back to the [Forest City].

He was immediately prepared to add such a system to his territory:
"Okay, everyone, get ready. We need to hurry up and start the battle tonight."

After Lindsay checked the attribute panel, he assigned tasks to the surrounding legion commanders.

He scouted the surrounding terrain as quickly as possible and arranged a temporary mutant cleanup mission.

The expeditionary force is already familiar with this kind of cleaning.

There are no surprises with temporary work.

By the time the expeditionary force had cleared out the larger number of mutants in the surrounding area, it was already the morning of the second day.

The transformation of [Underground Fortress] is completed, and the corresponding building lists are unlocked one by one.

The time of farewell is coming.

Lindsay was finishing up the work and checking the new building list. Sure enough, they were all things that fit the impression of a dungeon.

[Dark Mine]

Construction cost: 500 stone.

Effect: Provide ore mining and increase resource income.

【maze】

Construction cost: 1500 stone.

Effect: Creates a maze around the city, confusing enemies that enter it.

[Soul Altar]

Construction cost: 1000 Stone, 100 Bones.

Effect: Used to sacrifice enemies and enhance the dungeon's defense.

[Shadow Training Ground] Construction cost: 800 stone, 200 gold coins.

Effect: Train assassins and thieves, improving their combat skills.

【Dark Dungeon】

Construction cost: 500 stone.

Effect: The dark underground prison can continuously weaken the prisoners' will.

……

Lindsay looked at each one in turn.

The Underground City is indeed a force that is extremely good at fighting.

In addition to training thieves and assassins, it has a large number of buildings that enhance defense or offense attributes.

As for the materials, they had not been upgraded to a very high level, so they had not been greatly improved. All that was needed were stones, gold coins, or some miscellaneous items such as wood and bones.

The supplies accumulated by [Forest City] are more than enough to cover these expenses.

"It's a pity that I can't build it myself."

Lindsay shook her head slightly.

One of the benefits of the [Real-time Strategy] system is that he doesn't need to be fully supervised in the construction, he can just shoot down the new building frames.

Later, the craftsmen of the expeditionary force can build a city by themselves!

“Vivian, Levi, come here!”

Although Vivian and Levi had just commanded and participated in the battle, they rushed over immediately:
"Mr./Sir Lindsay, your orders!"

Lindsay led the two of them, walking in front of each building frame, introducing them carefully and earnestly:
"Let me explain to you in detail the specific functions of these buildings."

"Please remember this. I'm afraid I won't be able to get back in a short time. You are in charge of this place."

while introducing.

Other legion commanders also arrived one after another and took note of the functions and details of these buildings one by one.

After Lindsay finishes explaining, return to the city center of the [Underground Fortress].

He opened this special [City Hall] and saw the upgrade requirements for this thing.

"..."

"This request is really unique."

Just like the [Forest City] and [Zerg Nest] both have their own characteristics.

[Underground Fortress] is equally subtle. It needs this city to sacrifice 1000 slaves for it!
Leave it to normal times.

According to Lindsay's values, he would never allow such a blood sacrifice.

Even if it is for upgrading urban civilization, it is impossible to do such a thing.

but now……

Lindsay looked around and opened the map again.

It must have been too late before he left.

But aren’t these deformed beings that exist underground exactly the objects to be sacrificed in order to upgrade the city?
Lindsay suddenly spoke:
"I'll give you another task."

Vivian and Levi looked serious:
"You tell me!"

Lindsay turned to look at the two of them, with an evil smile on his face:

"After that, you stay here and kill the Deformers. Don't use them as fertilizer. Instead, drag them to the dungeon and sacrifice them. Once you have 1000 of them, use the rest to cultivate the Withered Tyrant Flower."

Vivian and Levi looked at each other.

Although this request sounded uneasy, their loyalty to Lindsay made them agree immediately:
"Yes! We will definitely complete the mission!"

Lindsay nodded with satisfaction.

"This couldn't be better."

After completing the work in the new city, Lindsay immediately turned around and left.

Without stopping for a moment, he returned to the ground along the built road.

At this moment, the daytime sunlight was shining on Lindsay's face from the east.

"Um……"

"It's a nice day."

He looked at the sun just rising on his left.

Then he took a step forward, his figure slid out a shadow, and immediately disappeared on the ground.

(End of this chapter)