NEKOUJI STUDIO

《CYAN BRAIN》Ver1.01 Update Notice

GAME LINK：https://www.dlsite.com/maniax/work/=/product_id/RJ01405813.html
Dear players, thank you for your continued support of CYAN BRAIN.
Here are the details of this update:

🎨 New Additions
Added 3 new reward CGs
　┗ Unlocked after clearing Stage 2, Stage 3, and Stage 4
　┗ Already-cleared save data can directly view them

⚖ Difficulty Adjustment
Made Easy Mode even easier to clear

🔫 Weapon Adjustment
Improved performance of certain weapons

🗺 Map Improvements
Adjusted layouts of certain maps

🐞 Bug Fixes
(1) Fixed issue where collected battle data would be lost if the protagonist died
(2) Fixed issue where protagonist would not appear at the correct location after loading a save
(3) Fixed freeze issue when re-entering Stage 2 and talking to HS202
(4) Fixed random crash issues
(5) Fixed freeze when opening doors in maps
(6) Fixed issue where some enemies would freeze in maps
(7) Fixed issue where protagonist could still roll during NPC dialogue
(8) Fixed incorrect UI display when restoring HP
(9) Fixed missing collision in some map areas
(10) Fixed negative ammo count issue

We sincerely appreciate your support and feedback!

CYAN BRAIN – Recent Update Details & September Free Update Preview (August 2025)

Upcoming Updates

• Fixing collected bugs

• Adding new sound effects

• Adjusting certain unreasonable parameters

• More detailed balancing for all difficulty modes
  　┗ Easy mode will become even easier

September Free Update Preview

• Two brand-new monsters & R18 execution animations

• New dynamic CG with full audio

• New collectible text entries

• Main menu character swap feature (replaceable with HS202)

• Expanded and adjusted parts of stage maps, with new collectibles

We are currently working hard to prepare these updates!

Purchase here: https://www.dlsite.com/maniax/announce/=/product_id/RJ01405813.html
Report bugs & share feedback on our Discord:https://discord.gg/uCsSTPmMjV

We sincerely thank you for your continued support and interest.

We will compile all feedback from players and address issues in future updates.

Please continue to look forward to it!

Help Us Improve 'CYAN BRAIN' – Bug Reports Welcome (August 12, 2025)

Dear players,
Thank you very much for purchasing and playing CYAN BRAIN. If you encounter any bugs or issues during gameplay, we sincerely apologize for any inconvenience this may cause. To improve your experience, we kindly ask that you report them on our official Discord.

Your reports will help us fix and improve the game more quickly. We greatly appreciate your understanding and cooperation.

📢 Report here (Official Discord)
👉 https://discord.gg/uCsSTPmMjV

🔗 Purchase the game here
👉 https://www.dlsite.com/maniax/announce/=/product_id/RJ01405813.html

NEKOUJI STUDIO
August 12, 2025

『CYAN BRAIN』DLsite Gift Card Giveaway ＋ Discord Channel Launch Announcement

Thank you all for your continued support of CYAN BRAIN.

To celebrate the release, we are holding an RT campaign where you can win a DLsite gift card!
In addition, we have officially launched our Discord channel, so please feel free to join us!

📜 How to Enter
① Follow @nekoujistudio & @iuui1551
② Retweet this post https://x.com/nekoujistudio/status/1954421330046292175
③ Join our Discord channel *Gift cards will be distributed on Discord
https://discord.gg/uCsSTPmMjV

⏳ Deadline: JST Aug 12, 10:00 AM
🔗 Preview page: https://www.dlsite.com/maniax/announce/=/product_id/RJ01405813.html

🧠🎮 Announcement of the Official Release of “CYAN BRAIN”

Thank you very much for your continued support of CYAN BRAIN.
We are pleased to announce that CYAN BRAIN will be officially released on Tuesday, August 12, 2025, at 16:00 (JST) via DLsite.

▼ Product page
🔗 https://www.dlsite.com/maniax/announce/=/product_id/RJ01405813.html

Be sure to add it to your favorites and look forward to the release!

CYAN BRAIN Release Date Announcement (August 7, 2025)

Thank you all so much for your continued support of CYAN BRAIN.

The day has finally come.

CYAN BRAIN is officially set to launch on Tuesday, August 12, 2025, exclusively on DLsite.

We truly appreciate your ongoing support and look forward to sharing this game with you.

📦 Release Date & Platform Information

Release Date: Tuesday, August 12, 2025

Platform: DLsite (Adult Version)

Price: 3,080 JPY (Tax Included) 10% OFF during the first month of release

▼DLsite Product Page

👉 https://www.dlsite.com/maniax/announce/=/product_id/RJ01405813.html
Don’t forget to add it to your favorites!

[CYAN BRAIN] Final Demo / Content Expansion & System Update (2025/07/17)

👁‍🗨 Announcement of “CYAN BRAIN” New Demo Release

To everyone who has supported us,
We sincerely apologize for the long wait.

This demo is the latest version of Chapter 1.
We have thoroughly refined the system and presentation based on previous content.

Main Additions and Adjustments:
・ Re-recorded and adjusted all character voices
・ Added difficulty selection
・ Introduced hunger and experience systems
・ Implemented a new inventory system
・ Enhanced enemy hit effects
・ Completely redesigned UI
・ Some late-stage monsters appear in advance

※ The current version has a slightly higher difficulty setting.
If you prefer a more casual experience, please select Easy Mode.

This demo serves as the final test version before the official release.
The main game is nearly complete, and development is progressing smoothly.
We are aiming for an official release next month, so please stay tuned.

We would love to hear your thoughts after playing.
If you are interested in the game,
we would greatly appreciate it if you could add it to your favorites via the link below:
https://www.dlsite.com/maniax/announce/=/product_id/RJ01405813.html

Thank you again for your continued support of “CYAN BRAIN.”
We are truly grateful for your warm encouragement.

— The Development Team

[CYAN BRAIN][2025/06/06] Announcement of DLsite Pre-Release Page & Promotional PV Launch

Dear supporters,

This is the development team of CYAN BRAIN.

We are pleased to announce that the DLsite pre-release page for CYAN BRAIN is now live.

▼Pre-release page

https://www.dlsite.com/maniax/announce/=/product_id/RJ01405813.html

Alongside this, we have also released the latest promotional PV.

We would be grateful if you could take a moment to check it out.

Adding the game to your favorites will greatly support our upcoming release and visibility.

Thank you as always for your continued support.
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◆ About the Official Trial Version
We plan to deliver an early access build of the full version to all our supporters at the end of this month or early next month.
Once again, thank you so much for your continued support.

[CYAN BRAIN] [2025/06/02] Promotional Video Early Access Release

Dear Supporters,

Thank you very much for your continued and exceptional support.

Development of CYAN BRAIN has now entered its final, accelerated phase.
We will soon be officially unveiling the product preview page on DLsite.

Ahead of that, we are pleased to present an exclusive early release of the promotional video for our supporters.
Please take a glimpse into a world where terror and beauty intertwine.

We deeply appreciate your continued encouragement and support.

Sincerely,
The CYAN BRAIN Development Team

[2025/05/01] April Development Update / Character Voice Sample Showcase

【Development Progress Report – April 2025】

Thank you as always for your continued support!

Here is our development update for April:

• Voice recording for the characters has been successfully completed.

• Animated CGs featuring voice acting are currently in active development. These will be available as reward items within the game.

• Background assets for stages 5 and 6 have been completed, and final stage construction will begin in May.

• We are also focused on intensive parameter adjustments and bug fixes.

• A new crawling-type creature capable of ranged attacks has been introduced.

Our entire development team remains dedicated to delivering an exciting experience for everyone. Please stay tuned for future updates!

Please note: The following video contains voice samples. Be mindful of your volume settings when playing.

[2025/04/02] March Development Progress Report / Content Showcase

Dear Supporters,

Thank you very much for your continued support.

We are pleased to announce that the development of Stage 4 is progressing smoothly.

All weapon systems and animations for the new monsters have been completed.
We are currently fine-tuning and improving the behavioral AI of these new monsters.

In addition, the production of the game’s soundtrack has been successfully completed.
Character voice recording is scheduled to officially begin in April.

Furthermore, we plan to release a promotional video (PV) announcing the game's upcoming launch in May.

Our entire team remains dedicated to creating a game you'll truly enjoy.
We sincerely appreciate your continued support!

[2025/03/01][Major Announcement] February Development Progress Report / Content Showcase Video Release

Dear Supporters,

Thank you very much for your continued support.

We sincerely apologize, but due to the extensive bug fixes required for each stage during development, we have decided to complete all game content before the official release. The game is scheduled for completion and release in the third quarter of this year.

Before all content is finalized, we will release an official game demo, including voice acting, game music, new systems, and the final UI. Supporters will be able to experience this demo in advance, around June.

In the future, new test versions may be released, and we will notify everyone one week prior to their release.

Progress Report:
Currently, we are working on the third and fourth levels simultaneously, with the third level nearing completion.

Thank you again for your continued support.

[2025/01/29][Progress Report] January Development Progress Report / Content Showcase Video Released

New Year's Greeting

Happy New Year!
We are deeply grateful for the support we received last year. Thanks to your encouragement, we have made significant progress in the development of this project. This year, we are committed to delivering an even more exciting and engaging game. Our team will continue to work tirelessly, and we hope for your continued support.

We wish you a wonderful year in 2025! Thank you once again for your unwavering encouragement!

==============================================================

January Development Progress Report

1. Story and Voice

The story and dialogue in the previous version were temporary. However, this month, the complete world-building story and dialogue have been finalized. Additionally, the recording of new character voice lines and ad-libs is in progress, which is expected to enhance the game's immersive experience.

2. Stage Design

The design of the third and fourth stages has been completed, with new terrains and moving platform elements added, enriching the stage experience. The third stage is currently under production and is expected to enter the testing phase soon.

3. Monster System

The design and production of new monsters are progressing smoothly. The effect where blood splashes randomly on walls when hitting a monster is nearly complete, adding more visual impact to combat scenes. Additionally, glowing effects have been added to monsters, improving their visibility and threat level in dark environments.

4. Weapon System

Several new weapons are under development, and the weapon system has been improved:
- In future versions, players will be able to permanently retain the weapons they pick up, enhancing the sense of progression and enjoyment of collecting.
- The number of weapon slots has been increased, and various types of ammo supplies can now be obtained on the map, offering more strategic choices.

5. Reward CG and Performances

Reward CGs are currently being produced, and voice acting and performances will be added later. These will appear in the game as story triggers or collectible elements, encouraging players to explore and unlock them.

6. UI Redesign

The UI is undergoing a complete redesign to provide a more intuitive, beautiful, and comfortable experience for players.

[CYAN BRAIN] Chapter 01+02 Test Demo/Content Expansion Update (2024/12/18)

Greetings

Thank you for your continued support! We are excited to bring you new updates and enhancements to make your gaming experience even more enjoyable. While the current update is still in the testing phase, we appreciate your valuable feedback to help us improve further.

Update Details

1. Updates to Chapters 1 and 2
   We have updated the content for Chapters 1 and 2, introducing new game mechanics.

2. Testing Phase
   The game is still in the testing phase, and there might be some bugs. We welcome your feedback.

3. Animation Feature Updates
   Although the animation viewing room is incomplete, you can now watch the current execution animations by returning to the base. Additional features will be introduced in future updates.

Future Update Plans

1. UI Overhaul
   The game interface will undergo a complete visual redesign to enhance its aesthetic appeal.

2. New Rewards and Story Additions
   - New rewards are planned.
   - A completely new adult story CG is currently in production.

3. Enhanced Music and Voice Features
   New BGM and character voices will be added.

4. Expanded Scene Collectibles and Dialogue
   Collectible items and new conversation elements will be added to scenes, enriching the exploration experience.

5. Character Growth System
   Defeating monsters will earn experience points, allowing for permanent weapon purchases and character ability upgrades.

6. Development of the Next Chapter
   New stages are currently in production and will be released in upcoming updates.

We are committed to delivering an even more enjoyable gaming experience, and we look forward to your continued support. Thank you!
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Before downloading, please be aware

Please note that the game contains graphic violence and adult content. Please use with caution.
Furthermore, use by individuals under the age of 18 is prohibited.

[2024/11/30][Update Notice] Chapter 02 Content Update and New CG Reveal Coming in Early December.

To all our followers, thank you so much for your continued support.

Currently, our programmer is in the process of recovering, and we are planning to update the content of Chapter 2 in early December.

We sincerely appreciate your understanding and support.
Please look forward to it!

[2024/11/02][Progress Report] Apology for Update Delay / Chapter 02 Content Demo Video

Dear Supporters,

Thank you for your continued support.

To everyone who was looking forward to the October update, we sincerely apologize. We worked diligently until the very last day, but unfortunately, we were unable to complete Chapter 2.

Currently, Chapter 2 is in a playable state, but it has more bugs than anticipated, and there are areas that still need to be fixed. As we are a small development team, we had no choice but to delay the update.

To provide you with a better gaming experience, we kindly ask for a bit more time as we add new interactive elements to Chapter 2.

Additionally, we plan to release exclusive CG content for our sponsors later this month, so please look forward to it.

Your support means everything to us, and it motivates us to work even harder. Thank you for your understanding and continued encouragement T=T

Progress Report [2024/09/30] Announcement of Content Updates for Chapter 02 and Chapter 03.

Dear followers, thank you for your continued support.

This month, the production of Chapter 2 is nearly complete, with only some programming work left related to the new weapon and monster systems.

The map for Chapter 2 is larger and offers more content compared to Chapter 1. We plan to release the complete version of Chapter 2 next month.

    Additionally, we have fixed issues with the strategy routes and balance adjustments for Chapter 1. In the next update, a newly illustrated defeat CG will be displayed after the boss executes the protagonist. Even if you don't obtain it during the stage, you will be able to view it in the post-clear viewing system.

Currently, production of Chapter 3 is progressing smoothly, and new maps, monsters, and weapons are planned.

Additionally, we have designed a 'Prototype Mech' that the protagonist can pilot. This mech significantly enhances combat power, but as it is a prototype, it is prone to overheating, posing a risk of the pilot melting. Please be cautious.

The newly illustrated maps will indicate the routes for upcoming stages, allowing the protagonist to reach even more diverse areas as the story unfolds.

 Thank you all for your support. We will deliver the new content as quickly as possible.

[2024/08/31][Progress Report] Chapter 01 Improvements / Chapter 02 Content Update Announcement

Dear Followers,

Thank you very much for your continued support.

Based on your feedback, we have made several adjustments to the stages.

We have reorganized the map in Chapter 01 to prevent players from getting lost or missing items.

Additionally, we’ve added new weapons to Chapter 01 and rebalanced aspects such as weapon damage, ammunition counts, and monster health. You can now zoom in when the execution animation plays.

Since Chapter 01 serves as the prologue, these adjustments are aimed at maintaining the challenge while making it easier to clear.

New Combat System Updates:

• Weapon recoil system

• Sound effects for shell casings dropping

• Color change effects when monsters take damage

• Blood splatter effects on walls when monsters are hit

• Slow walk mode activates when the protagonist aims while running

• New UI for protagonist’s HP and sound effects for severe injuries

Upcoming Chapter 02 Content Update:

Chapter 02 takes place in an energy facility. The protagonist, under the instructions of NPC "M", searches for crucial items within the facility and encounters other NPCs along the way.

Chapter 02 Updates Include:

• New weapons: Shotgun, bolt-action rifle, special handgun, and melee weapons

• Five new types of monsters (including a boss) and two new traps

• HP recovery devices with special animations

• Dialogue scenes and animation sequences with two NPCs

• New collectible items, information, and additional animation sequences

These new contents will be updated as soon as they are complete, with the aim of minimizing bugs.

We sincerely look forward to your experiences and feedback once again. Thank you for your continued support.

Apology Regarding Future Update Schedule Changes

Recently, the development of the game has become increasingly complex. To provide you with a better gaming experience, we will notify you one week in advance before uploading game files in the future.

We sincerely apologize for any inconvenience this may cause and appreciate your understanding and cooperation. 

[CYAN BRAIN] Base/Story System/Content Update (2024/08/01)

Dear followers, Thank you always for your support. 

Update Details:   

♦Home System: You can now return to the base area after completing a stage.

♦Animation Viewing Room: Interact with the bed at home to enter the Animation Viewing Room.

♦Home Interactions: Additional interaction scenes have been added within the home, featuring animations.

♦Story and Collections: New story dialogues, collectible items, and documents have been added to Chapter 1.

♦Falling Death Mechanic: A new mechanic for falling deaths has been introduced.  

♦Multilingual Support: You can now choose from Japanese, English, and Chinese languages in the settings menu.

 Upcoming Updates:   

1. The production of Chapter 2 is progressing well, with new monsters and weapons nearly complete.

2. The map for Chapter 2 is also in progress, adding new NPCs and storylines. You can select chapters to play from the save machine in the base.

3. Base Functionality Expansion**: New features such as upgrades and shopping will be added to the base, along with new animations.

Note: To play this version, please delete the previous version's save files located at **C:\Users\AppData\LocalLow\NEKOUJI\CYANBRAIN_DEMO\saves**.   

Note: This version is a test version and may contain bugs affecting gameplay. We appreciate your understanding and valuable feedback.

Note: The current voice files are for test purposes only.

 We look forward to your experiences and feedback.

Thank you for your continued support.

[July 31, 2024] We are currently working on fixing urgent bugs, and we will upload new files on August 1st.

Dear everyone,

We hope this message finds you well.

We sincerely apologize, but due to numerous issues with the game's save data system, the upload of the new game files has been delayed to August 1st.

### Updates in this release:

1. *Home System*: Players can now return to the base area after completing a stage.

2. *Animation Viewing Room*: You can access the Animation Viewing Room by interacting with the bed at home.

3. *Home Interactions*: Additional interaction scenes have been added within the home, allowing for animations to play.

4. *Story and Collections*: New story dialogues, collectible items, and documents have been added to Chapter 1.

5. *Falling Death Mechanic*: A new mechanic has been added where falling can result in death.

6. *Multilingual Support*: Language options for Japanese, English, and Chinese are now available. You can choose your preferred language from the settings menu.

Thank you for your understanding and continued support.

Best regards.

[2024/06/30][Progress Report] Announcement of July Content Update

Apology for the Delay in Progress

We sincerely regret to inform you that,

While we have completed the production of new monsters, characters, some base systems, conversation systems, and several collection items within June, due to the time taken for the development of the multilingual system and various bug fixes, the update for new content has been postponed to next month.

Furthermore, we are striving to expedite the production of subsequent stages.

Additionally, we aim to make it easier for everyone to understand the story of this game through conversations and files hidden in maps.

Future Production Strategy

In future versions, players will be able to choose Japanese, English, or Chinese languages, with Japanese voice acting also being implemented.

Moving forward, we plan to create more refined erotic animations, increase interactions between the female protagonist, environments, and NPCs, and enhance the experience of melee combat by adding new melee weapons.

Additionally, we intend to provide options for players who wish to clear the game more easily.

Introduction to the Base System

The base is where the female protagonist rests and selects stages. Upon entering the base, the protagonist changes into casual attire. As production progresses, various functionalities will be added to the base.

Within the base, players can enjoy many daily activities and also access animation viewing mode and upgrade their abilities. [Clearing a stage unlocks all animations for that stage.]

Some NPCs will appear in the base after interacting with the female protagonist, allowing for stimulating interactions through special means.

The base's scale will gradually expand with each update, introducing new activity areas. Additionally, players will be able to place certain collection items and monsters.

Please look forward to it!

[CYAN BRAIN] Chapter 01 Test Demo / Bug Fixes / Content Update (2024/06/17)

Dear followers,

Thank you very much for your continued support.

Thanks to your valuable feedback, we have addressed a series of issues in the previous version and introduced new features in this update:

♦ New weapons

♦ A device for replenishing ammunition

♦ A feature to expand the field of view

♦ Several new screen effects

*Please note that save data from the previous version will no longer be usable.

**Please be aware that this version is a test release and may contain bugs that could affect the gameplay experience. We appreciate your understanding and valuable feedback.

Once again, we look forward to your experiences and feedback. Thank you for your continued support.

Before downloading, please be aware

！！Please note that the game contains graphic violence and adult content. Please use with caution.
Furthermore, use by individuals under the age of 18 is prohibited！！

[CYAN BRAIN] Chapter 01 Test Demo Version (2023/05/31)

Dear followers, thank you very much for your continued support.

After much hard work, we are pleased to announce that the test version of Chapter 01 of [CYAN BRAIN] is now complete. We have uploaded the game content files so that our sponsors can play it.

Due to time constraints, the story and dialogue content within the game have not yet been implemented. We plan to update the scenario system in the game by next month.

This update includes the prologue map and related gameplay content, as well as new scenes, monsters, traps, and a boss.

• There is a possibility that the game save data may contain bugs. If you encounter any issues with the save data, please delete it and create a new save to play.

• The current version is a test version and may contain bugs that affect the gameplay experience. We appreciate your understanding and valuable feedback.

The content to be added in the next update includes the following:

△ Dialogue and collectible items for Chapter 1 to deepen the understanding of the story

△ New NPC characters

△ Many more new weapons

△ Base system update, allowing various activities at the base

△ Addition of an animation viewing mode

Once again, we look forward to your experiences and feedback. Thank you for your continued support.

[2024/05/21] [Spoiler Alert] Progress Report: Map01 Monster Video Showcase - Update Announcement

To our followers,

Thank you very much for your continued support.

We plan to update the demo version of Stage 01 between May 25th and 31st. We are working at full capacity right now.

Before releasing the official version of Stage 01, we will publish videos showcasing the monsters and traps.

▲ Please note: The uploaded videos contain spoilers. If you wish to experience these elements within the game, please do not watch!

⚠ The videos contain graphic violence and mature content, so please be cautious when viewing. Additionally, viewers under the age of 18 are prohibited from watching.

Download：

https://drive.google.com/file/d/1EcgwYBbGJW3Set_jexaNoEpTG2XzFKMA/view?usp=drive_link

△

[CYAN BRAIN] Survey on Content Production for Subsequent Illustrations and animate

[NOTICE][2024/04/30] We will update the content of the first chapter of the official version in mid-May.

To all our followers,

Thank you as always for your support.

We will be releasing paid updates to the content of the first chapter of the official version in mid-May. The updates will include:

- Maps

- Monsters, Bosses

- UI, Combat Systems, Weapons

and more...

Your support means a lot to us and serves as a great encouragement for our game development. We sincerely appreciate it.

Thank you very much.

[2024/04/28]進捗報告:KILL　Cards

▲怪物に倒された後に入手できるカード

▲The card obtainable after being defeated by a monster.

[CYAN BRAIN]制作初期展示デモInitial Demo - β(2024/04/22）

[CYAN BRAIN]の制作初期展示デモが公開されました。

皆様、いつもご応援いただき、誠にありがとうございます。

2024年4月6日にリリースされた初期体験版DEMO α は、制作時間が迫っており、多くの不具合がが発生しました。
緊急修正を経て、2024年4月22日にβ版をリリースいたします。

▲ ゲーム体験に影響を与える不具合の修正
▲ いくつかの不合理なモンスターの攻撃数値の修正
▲ BGMと新しい効果音の追加

皆様のご体験とフィードバックを心よりお待ちしております。

Dear everyone,

We sincerely thank you for your continuous support.

Due to the tight production schedule, the initial trial version DEMO α released on April 6, 2024, encountered numerous bugs. Following urgent fixes, we will be releasing the β version on April 22, 2024.

The following improvements have been made:

▲ Bug fixes that affected the gaming experience
▲ Adjustments to certain unreasonable monster attack values
▲ Addition of background music and new sound effects

We eagerly await your gameplay and feedback.

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数字キーを押して武器を切り替えます。 Switch weapons by pressing the number keys.

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ダウンロードする前にご注意ください

ゲーム内容には、血なまぐさい暴力描写や成人向け表現が含まれていますので、ご利用の際には充分にご注意ください。
なお、18歳未満の方の利用は禁止されています。

Before downloading, please be aware

Please note that the game contains graphic violence and adult content. Please use with caution.
Furthermore, use by individuals under the age of 18 is prohibited.

Gameplay video demonstration.