Helle's Undersea City Project MOD APK icon

Helle's Undersea City Project MOD APK v1.3.3 [Full] for Android

v1.3.3 2026-01-03 631.61 MB
5.0 (99 ratings) Safe Verified
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Grow land and build a city! Build your own undersea city with Hele!


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📋 MOD APK Details

📅 Updated 2026-01-03
📱 App Name Helle's Undersea City Project
🔢 Latest Version v1.3.3
🎮 Genre Simulation
👨‍💻 Developer Emma Create Co Ltd
📦 File Size 631.61 MB
🤖 OS Version 8.0
⚡ Mod Features Full
🔑 Package Name jp.co.emmacreate.helle
📥 Get it On Google Play Store

🎯 MOD Features

Full

  • ✓ Full
  • ✓ No Root Required
  • ✓ Verified Working
  • ✓ No Malware
  • ✓ Free Download

📸 Screenshots

Helle's Undersea City Project MOD APK screenshot
Helle's Undersea City Project MOD APK screenshot
Helle's Undersea City Project MOD APK screenshot
Helle's Undersea City Project MOD APK screenshot
Helle's Undersea City Project MOD APK screenshot
Helle's Undersea City Project MOD APK screenshot
Helle's Undersea City Project MOD APK screenshot
Helle's Undersea City Project MOD APK screenshot
Helle's Undersea City Project MOD APK screenshot
Helle's Undersea City Project MOD APK screenshot
Helle's Undersea City Project MOD APK screenshot
Helle's Undersea City Project MOD APK screenshot
Helle's Undersea City Project MOD APK screenshot
Helle's Undersea City Project MOD APK screenshot
Helle's Undersea City Project MOD APK screenshot

📖 App Description

Grow and expand the land with air, aiming to rebuild the undersea city with a lone girl, Hele! A new type of undersea city-building simulation game!
Grow land and build a city!
Build your own undersea city with Hele!


This game is a simulation game that takes place on a wide ocean floor, where "land" is cultivated and "cities" are built!
This is an undersea city-building simulation game set in an undersea city that has lost its people, where you and the main character "Hele Tokitsumi" aim to restore the city.
The goal is to expand the city by utilizing air-generating structures called "Mira's Flowers" and cultivating the surrounding land,
The goal is to restore the original vitality of the city.


Buildings consume "air" to operate,
Air must be produced and supplied by a plant called "Mira's Flower."
In order to plant "Mira's Flowers," the land must be cultivated.
In order to raise the land grade, it is necessary to acquire a "prosperity value".
The "fertility value" can be obtained at random from the land around the facility when the residents use the facility,
When a certain amount of "thriving value" is acquired, the land grade will be raised.
There are several types of Mira flowers, each with different characteristics, so the key to the strategy is to develop the city while utilizing various Mira flowers according to the environment and progress.


Each of the more than 50 buildings in this title is classified into four types.
"Dwellings," which allow residents to call a town home,
"Production facilities," which can be set up around special terrain where resources are buried, and where residents can obtain resources when they visit,
"Processing facilities," which can earn money in exchange for resources,
"Commercial facilities," which residents can use to earn money.


Exploration is required to obtain recipes for new buildings, Mira's flower seeds, mysterious oparts needed to liberate the story, and area liberation items.
The objective is to board an exploration boat and wade through enemies and traps that lurk in the deep sea to obtain the items and to step over them.
There are three parameters for exploration boats: HP, air, and payload, each of which can be strengthened with money.


In this title, including the main character Helle,
More than 30 different characters will enliven your town with their dot-pictures.
Some of the inhabitants are cute animals...?
Please look for them!


In addition, there are three difficulty levels in this game: [EASY], [NORMAL], and [HARD]!
There is also an EASY mode for those who are new to city planning games, and a NORMAL mode for those who have played many city planning SLGs,
The game also offers three difficulty levels: EASY, NORMAL, and HARD!


You and Hele will weave a story that is well worth reading!

The setting is the underwater city of Garden, where the sky is covered by the sea.
In this city built by the ancient people who escaped from the fire-engulfed earth long ago, the "Mira Flower," which produces air, sustains the lives of the residents,
The "Mira Flower," which produces air, supports the lives of the inhabitants.
The disappearance of Yona Kujira, the person in charge of governing and managing the Garden, has left the city in ruins,
The "Sengu," a Shinto ritual in which the city is rebuilt from the ground up once every 150 years.
The effects of these events caused many residents who had been living peacefully in the Garden to flee to other underwater cities.
The only one in the undersea city that has lost everything, buildings and residents,
Hele Tokitsumi" is struggling to bring the city back to life.
In the midst of all this, the player, transformed into a stuffed sheep, is sent to the Garden by chance,
The player, disguised as a "stuffed sheep," is sent to the Garden by chance.
Together with Herre, you and Tokitsumi will work together to make the Garden a great town again!

❓ Frequently Asked Questions

Is Helle's Undersea City Project MOD APK safe to install?

Yes! Helle's Undersea City Project MOD APK is security-checked before publishing and includes a "Safe Verified" status on our platform. We scan every file for viruses, malware, and spyware before making it available for download.

Does Helle's Undersea City Project MOD APK require Root access?

No, this MOD APK does not require root access. SafeMod provides "No-Root" versions for the majority of mods, ensuring your system's core security remains intact. Simply download and install like any normal APK file.

How do I update Helle's Undersea City Project MOD APK safely?

To update, simply download the latest version from SafeMod and install it over the existing one. You don't need to uninstall the old version (this keeps your game data safe). Never update modded apps through the Google Play Store.

What are the MOD features included?

This MOD version includes: Full. These features provide unlimited in-game resources, unlocked premium content, ad-free experience, and enhanced gameplay.

How to install Helle's Undersea City Project MOD APK?

1. Download the MOD APK file from SafeMod
2. Enable "Unknown Sources" in your device settings
3. Open the downloaded file and tap "Install"
4. Wait for installation to complete
5. Open and enjoy the modded features!

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