A next-gen SF narrative adventure combining AI with voice input. Communicate in real-time with a lonely girl in a crumbling world. As her operator, your actual words will guide her through a 3D first-person immersive experience where your voice shapes the fate of the story.

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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 have transitioned from a Demo to Early Access to support our essential in-game purchase system.

Initially, we submitted this build as a Demo, but we learned that in-app purchases are not permitted within the Steam Demo framework. However, this game requires real-time API communication (OpenAI API), and a monetization system is essential to manage the ongoing backend server costs.

To ensure a fair experience, every player is granted enough initial "Play Time" to complete approximately one full playthrough of the available content for free. Transitioning to Early Access allows us to maintain this server environment while providing players with the option to purchase additional time if they wish to continue beyond the first playthrough.”

Approximately how long will this game be in Early Access?

“We plan to remain in Early Access until the full release on January 21, 2027. During this period, we will focus on fine-tuning the game balance based on player feedback and refining every detail to deliver a top-tier "cinematic experience" through continuous development and polish.”

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

“While the Early Access version focuses on providing the introductory part of the story, the full version will expand upon this foundation with the following additions:

・Complete Storylines and Multiple Endings: The full narrative arc, including various branching paths and conclusions.

・Enhanced Cinematic Direction and Visual Effects: Further polished cutscenes and upgraded visual fidelity for a more immersive experience.

・Refinement of Game Balance and Parameters: Comprehensive adjustments to in-game values and settings based on player data.

・New Gameplay Mechanics and Deeper Interactions: Introduction of additional systems and more meaningful ways to interact with the characters.”

What is the current state of the Early Access version?

“The current version is fully playable and ready for public release.

Initially, we submitted this build as a Demo, but we were unaware that in-game purchases are not permitted within the Steam Demo framework. Following the reviewer's feedback regarding this policy, we have transitioned the project to Early Access to ensure full compliance with Steam's guidelines. All core systems, including the monetization and API integration, are already implemented and functioning correctly.”

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

“Yes, we plan to increase the price upon the full release.

During the Early Access period, the base game will be available for free to gather player feedback and stabilize the API environment. This version is expected to include enough initial "Play Time" for approximately 40 minutes of gameplay.

For the full release, we plan to transition to a paid model that includes a larger base package, offering approximately 6 hours of "Play Time." We also intend to provide bonus play time and exclusive content to our Early Access participants to show our appreciation for their early support. The unit price for additional in-game "Play Time" purchases is planned to remain consistent throughout and after the Early Access period.”

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

“We highly value player feedback to improve the overall experience and ensure the stability of our backend API systems. Players can participate in the development process by reporting bugs, sharing impressions, and offering suggestions via the Steam Community Hub.

As a token of our appreciation for those who provide significant contributions or valuable feedback during the Early Access period, we plan to include their names in the credits of the final game (upon request).

We view this Early Access as the "Chapter 1 Experience." With the first 40 minutes or so provided for free, we encourage everyone to play the game and share their thoughts on the atmosphere and core mechanics. Your voice will directly help us shape the future of this project!”
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This game is not yet available on Steam

Planned Release Date: January 2027

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About This Game

A new form of storytelling: The "Participatory Movie" experience.

Call into the Hollow : [2300] is an innovative narrative adventure that utilizes generative AI and voice recognition technology to create a deep bond between player and character.

[Story: Transmission from a Lonely Girl in 2300]

The year is 2300. A young girl is left alone in a mysterious, crumbling space, her memory lost. Your only connection to her is a "voice transmission" that transcends time and space. As her Operator, you must warn her of impending dangers, guide her actions, and provide the emotional support she needs to survive.

【Key Gameplay Features】

  • Real-Time Voice Interaction: Forget traditional menus or buttons. Talk directly to the character using your microphone. Generative AI analyzes your voice and generates natural, real-time responses from her, making every conversation unique.

  • Shared Perspective (3D First-Person): The entire game is rendered from the character’s point of view. You see what she sees, allowing you to analyze her surroundings and provide crucial instructions to navigate dangers.

  • Dynamic Narrative Branching: There are no fixed command lists. Your actual words and advice naturally influence her decisions and branch the story into multiple directions.

  • Breaking the Fourth Wall: You are not just a player; you are a character in this world. The boundary between reality and fiction blurs as you become the "Operator" she relies on for survival.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

This game uses generative AI for dynamic dialogue and narrative progression with the main character, "Lily." Instead of relying on pre-set options, this technology allows the character to generate natural responses and take appropriate actions based on the specific context of the player's real-time voice input.

System Requirements

    Minimum:
    • OS: Windows 10/11 (64-bit)
    • Processor: Intel Core i5-8400 / AMD Ryzen 5 2600
    • Memory: 8 GB RAM
    • Graphics: NVIDIA GTX 1070 / AMD RX 5600 XT
    • DirectX: Version 11
    • Network: Broadband Internet connection
    • Storage: 10 GB available space
    • Sound Card: Windows対応サウンドカード
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