The hero ends up in a sealed bunker with futuristic tech. Salvation turns into a trap: systems are silent, doors locked. Good news? There’s a cute girl here. Bad news? The only way out seems to be a suspicious portal that could lead anywhere… or nowhere.

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Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“We decided to release the game in Early Access so we can develop it together with the players. Your feedback and ideas help us see the project from different perspectives and turn it into something truly special. We want to make the game as polished as possible - and that’s why hearing from you is so important to us.”

Approximately how long will this game be in Early Access?

“We plan to release the full version of the game by the end of 2026. However, this timeframe may change depending on various factors — such as the amount of new content, the complexity of testing, player feedback, and the need for additional polishing. Our main goal is to deliver a complete and well-rounded experience without rushing the development process.”

How is the full version planned to differ from the Early Access version?

“In the full version, we plan to add a complete storyline and expand the relationship system between the characters. We aim to further develop the story and make the game world feel more alive and emotionally engaging, so that every moment leaves a lasting impression.”

What is the current state of the Early Access version?

“The current version already includes the main part of the story, key characters, and a relationship-building system between them. The project is fully playable and conveys the atmosphere of a confined space, where every decision affects the mood and trust of the characters.”

Will the game be priced differently during and after Early Access?

“Yes, we plan to gradually increase the price as new updates and content are released. This will help support the ongoing development of the project and reflect the amount of work that goes into the final version.”

How are you planning on involving the Community in your development process?

“We carefully read player feedback and listen to the ideas of our community. It’s important for us to understand what players enjoy and what can be improved. Players can share their thoughts and suggestions on our official Discord server and in the Steam Community forums. We regularly post development updates, announce upcoming features, and take community feedback into account when creating new content. Every comment helps us make the game better.”
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Mature Content Description

The developers describe the content like this:

This game contains mature content. All characters involved in mature content are adults. Content Warning: explicit sexual content, nudity, and alcohol use. Player discretion is advised.

About This Game

Heart of the Bunker is an atmospheric visual novel and relationship simulator with exploration elements.

Story

You are a diver who accidentally ends up in an underwater bunker hidden beneath a massive layer of water.
You’re not alone here: the bunker is home to several girls, each combining danger, secrets... and an unexpected allure.

Explore, survive, get to know the girls more deeply and uncover their mysteries - because in these relationships, any choice you make can become crucial.

Are you ready to search for a way out... or will you find a reason to stay?

Relationships

In isolation, it’s especially important not to be alone. You’ll get to know an intelligent android and other girls, each with her own personality, secrets, and desires. Show attention, make choices - and you’ll be able to build a relationship with any of them... or even with all of them, if you can manage it.

Mini-Games

The bunker’s equipment opens up many possibilities: repair systems, assemble devices, solve puzzles, and complete dozens of mini-games as you interact with various mechanisms, gradually bringing the entire complex back to life.

Game Features

  • The atmosphere of an underwater bunker with sci-fi elements;

  • A deep story about survival, trust, and growing closer in complete isolation;

  • High-quality hand-drawn art created for every key moment of the game;

  • Building relationships with unique girls - from an android to an alien elf;

  • Intimate and explicit 18+ scenes that let you get much closer to the girls;

  • Dozens of mini-games involving repair, hacking, tuning, and maintaining equipment;

  • A choice system - every decision affects the story and the dynamics of relationships;

  • Original music that highlights the mood of every moment.

System Requirements

Windows
macOS
SteamOS + Linux
    Minimum:
    • OS: Windows 10/11
    • Processor: 2.0 GHz or faster processor
    • Memory: 4 GB RAM
    • Graphics: 2 GB display memory
    • DirectX: Version 9.0c
    • Storage: 1 GB available space
    Minimum:
    • OS: Mac OS X 10.6
    • Processor: Apple M1
    • Memory: 4 GB RAM
    • Graphics: 2 GB display memory
    • Storage: 1 GB available space
* Starting February 15, 2024, the Steam Client will no longer support 32-bit games or macOS 10.14 or lower.
    Minimum:
    • OS: Linux x86/x86_64
    • Processor: 2.0 GHz or faster processor
    • Memory: 4 GB RAM
    • Graphics: 2 GB display memory
    • Storage: 1 GB available space
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