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Symbiont Zero-Type [v1.0.0] [Gekka Kobo]

2d game 2dcg animated bestiality censored combat dystopian setting female protagonist graphic violence japanese game monster multiple penetration oral sex platformer

3.0 Rating 145 Views Updated Oct 2, 2026 Completed

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In 2079, Ella Lane, a former Stardust Biotech security operative, returns to Kuroishi City after a failed experiment turns its

In 2079, Ella Lane, a former Stardust Biotech security operative, returns to Kuroishi City after a failed experiment turns its residents into wild and violent creatures known as Distortions. Her younger sister Ria, a researcher on the project, had gone missing after sending Ella a distress signal.
With the city under quarantine and Stardust Biotech covering up the outbreak, Ella sets out to find her sister and uncover what really happened.

Thread Updated: 2026-10-02

Release Date: 2026-09-24

Original Name: 共生体・零式

Developer: Gekka Kobo (月華工房) DLSite – Ci-en

Censored: Yes (Mosaics)

Version: 1.0.0

OS: Windows

Language: English, Japanese, Chinese

Store: DLsite

Other Games: Link

Genre:

2D Game, 2DCG, Animated, Bestiality, Censored, Combat, Dystopian setting, Female Protagonist, Graphic violence, Japanese Game, Monster, Multiple Penetration, Oral Sex, Platformer, Point & Click, Rape, Stripping, Tentacles, Vaginal sex

Installation:

1. Extract and run.

Changelog:

v1.0.0

Full Release

Demo v0.2.8

Gameplay Upgrade: Obstacles have been added in certain areas.

You must eliminate all enemies within the designated zone to remove the barriers, creating a more intense experience.

Try using grenades; taking out groups of zombies is very satisfying.

Game balance adjustments:

Overall firearm damage has been increased, and enemy damage has also been raised. This creates more back-and-forth combat.

The prolonged stalemates from the previous version are gone, making gameplay pace faster.

The official version includes melee weapons: Shurikens.

Revamped visuals for all weapons, plus improved bullet effects and gunshot sounds.

Add scenes of sexual activities in the NPC prison cells.

Every stage now features a minimap with markers for your objectives, to prevent you from getting lost.

The official version will have a total of 13 levels. (With Story Arc Levels). The trial version only has 2 levels. The trial version gallery will not be available.

The full version has been submitted for platform review.

I’ve set the official launch date on the backend for the 25th of this month.

However, Japan is observing national holidays these days, which means there may be no staff available to process reviews.

This could delay the official release date. I will notify everyone separately if there are any changes to the schedule.

Demo v0.2.7

Picking up items with the F key has been changed to automatic pickup. (Except for important items)
Improved the visibility of the gun graphics.
Improved the visibility of monster HP bars.
Increased the stamina cost of the protagonist’s dash to prevent consecutive dashes. (Max 2 consecutive dashes)
Added some recovery frames to the protagonist’s dagger attack to prevent it from being too strong.
Increased the attack power of all monsters while slightly lowering their HP.
Modified some of the protagonist’s animations.

With these improvements, the overall game difficulty has increased slightly.

Demo v0.2.5

In this update, we’ve made the following adjustments based on your feedback:

Added one save point each to Stage 1 and Stage 2.
Reworked some of the main character’s animations and adjusted the monsters’ movements as well.
Added a map display. Press the M key to toggle it on/off.
Slightly adjusted the male zombie’s attack power.
Reduced the item drop rate from wooden crates.
Increased the chance of the main character being knocked down, making H-scenes easier to trigger.

Some players have mentioned that defeating enemies feels too easy. We’d like to clarify that the currently released demo is essentially a tutorial, so it’s naturally designed to be simple. In later stages, new powerful monsters and enemies with ranged attacks will appear. We’ll be gradually and appropriately increasing the difficulty as players progress through the levels.

Demo v0.2

Initial release

Developer Notes:

Story

The year is 2079, in the near future.

As humanity achieves technological breakthroughs that transcend the barriers of biological genetics, Stardust Biotech secretly initiates the “T-7 Symbiote” project under the guise of “treating incurable diseases.” The goal: to fuse human cells with the genes of an unknown extraterrestrial lifeform and create “super soldiers.”

However, the experiment spirals out of control. The symbiotes begin to infect humans, transforming them into grotesque, feral monsters stripped of reason—creatures known as “Distortions.” To cover up the incident, Stardust Biotech quarantines Kuroishi City, the site of the experimental facility, and deploys a mercenary unit to “cleanse” the area of any survivors.

Ella’s younger sister, Ria, was a core researcher at Stardust Biotech and the only person who knew the formula for the antidote. Just before the lockdown, she sent a distress signal to Ella—but has been missing ever since.

The Final Battle Between Humanity and the Zombies
Ella Lane

Age: 24
Affiliation: Former special marksman in the Security Division of Stardust Biotech.
Background: Once boasted the company’s peak combat capabilities in both close-quarters and firearms warfare. She possesses a calm, decisive nature, yet harbors a somewhat melancholic aura.
History: Three years ago, she refused to carry out the company’s heartless order to “dispose of test subjects.” Framed for misconduct as a result, she was expelled from the corporation. Since then, while living a wandering life, she has secretly continued investigating Stardust Biotech’s illegal experiments.

Zombies, insects, beasts, tentacles, spiders—a diverse array of monsters appears throughout the game.

Each enemy type features a unique event triggered specifically when the protagonist is defeated.

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Thank you silverarrow1026 for the link