Symbiont Zero-Type

by Gekka Kobo

Censored Windows
Versionv1.0.0
EngineUnity
Released2026-09-24
Updated2026-10-02
LanguageEnglish, Japanese, Chinese

About Symbiont Zero-Type

Symbiont Zero-Type is a Japanese adult game by Gekka Kobo, built in Unity with 2D CG art and animation. You play Ella Lane. She was a former Stardust Biotech security operative who returns to Kuroishi City in 2079 after an experiment turns residents into violent Distortions. She searches for her missing sister Ria while the city is quarantined and the outbreak is being covered up. The play mixes point-and-click exploration with side-scrolling platforming and combat against monsters.

The current build is the full v1.0.0 release, dated September 24, 2026, for Windows, in English, Japanese, and Chinese, with mosaic censorship. The latest update added obstacles that are removed by clearing enemies in set areas, grenade use, improved firearm and enemy damage for faster combat, shurikens as melee weapons, updated weapon visuals, bullet effects, and sounds, sexual scenes in NPC prison cells, and minimaps with objective markers on every stage.

Developer's description

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.​

Download Symbiont Zero-Type v1.0.0

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

Player reviews

Player rating 3.0 / 5 · 3 ratings
Written reviews 3 · avg 3.0★
Positive (4–5★) 33%
Latest review 2026-10-01

What players say

Average, mixed reviews praise combat and style but criticize limited adult content.

5★ 0
4★ 1
3★ 1
2★ 1
1★ 0

Players like

  • Combat feels decent and fun
  • Pleasant, consistent graphics
  • Movement feels fluid

Common complaints

  • Backgrounds and NPC animations feel underdeveloped
  • Adult scenes are poor or limited
  • Content variety feels limited

Best for players who enjoy Yidhra-style action demos with decent combat

Summarised from 3 written player reviews.

xSebix 2026-10-01 ★★★★★
A game very similar to *The Shadow of Yidhra* and *The Blood of Yidhra*, but significantly worse. Aside from the movement—which is just as fluid—there is no voice acting and very little dialogue. The game's overall quality leaves much to…
SiGa7 2026-08-26 ★★★★★
It's a demo but I guess it's ok. Very very similar to The Shadow of Yidhra or The Blood of Yidhra ... which are also very very similar to each other. There's the signature "game beatable by walking and knifing"…
Goool 2026-08-26 ★★★★★
Overall, it's good. As SiGa7 pointed out earlier, this game is a copy of The Blood of Yidhra . The graphics are pleasant and have a consistent style. The scenes of violence aren't particularly original, but they're varied. I'd like…

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