CYAN BRAIN

CYAN BRAIN

NEKOUJI · 2025 · Sexual Content, Gore, Nudity, Hentai, Female Protagonist

PC
Very Positive89% · 1,343
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$14.99
lowest tracked $13.49
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Standard Edition · Steam
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About CYAN BRAIN

‼️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 BRAINCYAN 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.
ProtagonistCV: Momoka KosuzuA 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.HS202CV: Ryo SuzukiA member of the Church's Hunting Squad, but... it seems she's gotten lost.LCV: Izumi MikoshibaA 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.MCV: Yui OtokuraA 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.

DLC & expansions

🎁 Complete the collection

Base game + 1 of 1 DLC at today's best prices.

$19.98
to own everything

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Jul 15, 2026
lovely, amazing art by iuui c:
2 found this helpful
Recommended Jul 17, 2026
i love the gore part
1 found this helpful
Recommended Jul 17, 2026
holy peak 🥹🥹
1 found this helpful
Recommended Jul 15, 2026
i was surprised at how well the game functioned together, mechanics, story and plot, i think this dev team will make the sequel even better and i will definitely be waiting and supporting the creators. i only expected a quick horny game but am pleasantly surprised by the story! quick pace, variety in weapons, wish the had more cosmetics, maybe even a chargeable weapon? best part for me was the fight with the centaur like enemy, more fun then frustration when i died over and over for a bit.
1 found this helpful
Recommended Jul 13, 2026
I loved this. The game play is pretty fun. Nothing special, but guns feel good, the melee attack is surprisingly useful and the generous invincibility frame during dodge roll makes this game feel less punishing than it could have been. The story is, again, nothing special. Something about mankind messing with science in things they shouldn't have and everything went to hell. Those tech billionaires. When will they learn? But I enjoyed some surprisingly cute moments in a setting where cute anime girls are being butchered left and right. I loved the Bestie character. I'm not really into guro. But it's kinda refreshing to see some shocking contents in this age of rampant censorships. Plus, I gotta admit the attention to detail that the artist put in is rather remarkable. Speaking of which, I highly appreciate not having to die just to unlock scenes. I'm all for defeat scenes, but I hate having to die on purpose just to unlock them in the gallery. In this game, simply clearing a level unlocks all the scenes from that level. That is a big plus to me. I'm the definitely going to pick up the sequel.
1 found this helpful
Recommended Jul 21, 2026
The gameplay is simple, yet the weapons and bosses make it interesting enough. The brutal art style and atmosphere really make this a worthwhile experience (if you are not squeamish).

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