CYAN BRAIN

CYAN BRAIN

Released Dec 2025

Cyan Brain is a decadent sci-fi side-scrolling action shooter. Awaken to face endless slaughter and desperate encounters. "Are you ready to make the ultimate devotion?"

89% positive · 1,511 reviews
Done
All announced content has been released
High confidence
Done
All announced content has been released
High confidence

Where to buy

Steam $13.49 $14.99 −10%
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Evaluation

CYAN BRAIN launched on December 11, 2025 and received several post-launch patches addressing bugs, translation issues, uncensored assets, and the addition of a Steam achievement system. On January 14, 2026, the developer posted a milestone update announcing 50,000 copies sold and explicitly stated: "With the game now in a stable state, we will conclude major updates to Cyan Brain after a final maintenance period, shifting our full focus to the sequel." This is a direct developer statement that major updates to the base game are ending. The only DLC released is an artbook that shipped on December 16, 2025. Subsequent news posts from the developer focus entirely on other projects — Cyan Brain 2, Monster Lord: Sapphire, and LifeGuard Legend — consistent with their stated shift away from the original game. There is no announced or unreleased content for CYAN BRAIN itself.
Evidence
Developer explicitly states that major updates to Cyan Brain will conclude after a final maintenance period, with full focus shifting to the sequel Cyan Brain 2.
news post · Jan 14, 2026 source development ending
high
Cyan Brain 2 development update detailing new systems and mechanics, confirming the developer's resources are now focused on the sequel.
news post · Mar 3, 2026 source development ending
medium

Content

1 of 1 released · no outstanding content
Released
Dec 2025

Details

Developer
Publisher
Mango Party
Achievements
10
Platform
Windows
Controller
—
Steam Deck
Playable
Players
Single-player

About this game

‼️This game contains violence, gore, and extreme content. Please read and play with caution.‼️

Unknown time. Unknown place.

The moment the nameless girl opens her eyes, her destiny is already set in motion. With no prayer nor blessing to guide her, she steps alone into a colossal ruin choked with deranged machines.

After unbearable despair and the unending cycle of slaughter, the wavering blue light of her will is shattered, stolen, and trampled again and again, yet she continues forward.

Between cruelty and salvation, the tolling of the Church’s bells cuts through the world, and as their maddening echo strips away the last restraints of flesh and mind, the world begins to shift.

In the depths of this nightmare, she sees it:

Two souls appear, reflections of each other's shadow.
"Are you ready to make the ultimate devotion?"

A dark fable of existence, annihilation, terror and pleasure

- CYAN BRAIN

CYAN BRAIN is a decadent sci-fi side-scrolling action-shooting game.. The game includes the following:

Visceral shooting action

Fear-inducing executions

Mountable heavy weapons

Full-screen animated cinematics

When you take damage in combat, your outfit will gradually tear. Successful attacks trigger random, realistic blood-splatter effects that make the action feel even more visceral. If an enemy defeats you, a unique execution animation will play, and you’ll receive a collectible Death Card upon your character’s demise.

Collectibles:

  • weapons: 16

  • Enemies & Traps: 32

  • Execution & H-Animations: 34

  • Death Cards: 36

  • Full-Screen HCGs: 3

You can view them all in the in-game gallery!

Gameplay Hints:

  • Eating food increases your hydration. Healing items are automatically created at max hydration.

  • Use your melee weapon to take out enemies when out of ammo

  • If you don't want to go out in the nude, saving the game will bring back your clothes.

Protagonist

CV: Momoka Kosuzu

A girl who has lost both her name and her memories. To fulfill the mission entrusted to her, she explores a vast ruined city while battling the many hostile entities created by the organization known as the Church: a group that once reshaped her body into a living weapon. Each fight sharpens her skills, strengthens her body, and leads her to new and powerful gear whose potential she gradually unlocks.

By following the memory fragments scattered throughout the map, she draws closer to the truth behind this devastated world. The companions she meets along the way give every step she takes through the ruins real meaning. In time, those connections will become the signposts guiding her toward the "end of fate" that awaits.

HS202

CV: Ryo Suzuki

A member of the Church's Hunting Squad, but... it seems she's gotten lost.

L

CV: Izumi Mikoshiba

A former researcher of the Convent. Before her death, she preserved her lingering consciousness inside a specialized device and entrusted a certain plan to the newly awakened protagonist.

M

CV: Yui Otokura

A mysterious girl who appeared within a strange domain. She speaks in a cold, mechanical, almost emotionless tone.

*The final version of the game will be uncensored. Store images are for promotional reference only.

Last evaluated Jun 16, 2026
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