Angel Legion

CYAN BRAIN

NEKOUJI  •  Dec 11, 2025  •  93% from 172 reviews

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?"

$14.99 (USD)

Videos & Images

Take a look at what's happening in CYAN BRAIN

CYAN BRAIN screenshot
CYAN BRAIN screenshot
CYAN BRAIN screenshot
CYAN BRAIN screenshot
CYAN BRAIN screenshot
CYAN BRAIN screenshot
CYAN BRAIN screenshot
CYAN BRAIN screenshot

Reviews Summary

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Top rated reviews

So I don't usually leave reviews on H-games because there's a possibility it could get back to certain people I know irl, and I don't need to have that conversation--but I feel compelled to leave a review here because I think this game is really special in a way I don't really see people talking about. Let's get the obvious out of the way first: if you're …

113 found this helpful Read more on Steam →

This game portends the question: what if we took the juxtaposition of sex and death to its extreme and fused that into a low effort and repetitive video game with a great style and decent but very sporadic sci-fi storytelling? Do the extremely gory and perverse animations make up for the actual video game itself being bland? Yes, for some reason they do. I…

66 found this helpful Read more on Steam →

[h3]CYAN BRAIN: The Long Walk[/h3] Games like this remind us why video games can be considered art. This is not your average NSFW side-scroller; the atmosphere and art design are on a level unreachable by most famous titles of its genre. Here, spiced up with just enough gore and sexualization, CYAN BRAIN sets a new standard for both side-scrollers and NSFW…

43 found this helpful Read more on Steam →

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.

News & updates

Latest from the developers.

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Comments (123)

Most recent community feedback.

Zestine

Love the visuals and the side missions. The character banter is top tier.

Nyra

Story is solid and the combat feels great, just wish there was more UI customization.

Kiro

I keep coming back after every update. The new scenes were worth it.