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A bio-punk 2D action game where you transform into a parasitic creature and escape from a research facility
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itch.io Community » General » Release Announcements · Created a new topic Enjoy Symbion, a boss-focused platformer action game
https://mystia1.itch.io/symbion
Key Points
BIOPUNK WORLD
Explore a grotesque world where flesh, parasites,
and technology intertwine.
BOSS BATTLES Take on deadly biological experiments in intense, distinctive boss encounters.
FAST-PACED PROGRESSION Keep moving with a streamlined experience that gets you straight into the action.
EASY-TO-LEARN CONTROLS
Simple, intuitive controls let you focus on combat and movement.
Game Patch History
I am updating diligently. The following is the update history Please play a lot
# Symbion Content Update — August 31, 2026
This update introduces new bosses, an ending sequence, playable Slime content, and a persistent difficulty system for additional playthroughs.
## New Content
- Added the seventh boss: **Electric Alchemist**
- Triple electric-orb link attacks
- Lightning attacks that relay between walls
- Diagonal arena-wide attacks
- Radial electric discharge attacks
- Added the final boss: **Android Titan**
- Hologram clone summons
- Detachable head bombs
- Giant laser blade attacks
- Arena-wide syringe strikes
- Added a **final ending cutscene** that plays after defeating the Android Titan for the first time.
- The sequence changes depending on whether the player is in Human or Slime form.
- Ending completion is permanently recorded.
## Slime Assimilation
- A special assimilation cutscene now plays after losing to the fourth boss for the first time.
- Completing this sequence permanently unlocks the **playable Slime form**.
- Added unique Slime animations and effects for movement, attacks, dashing, jumping, and grappling.
- The lobby background and character presentation change after unlocking the Slime form.
- The fourth boss is stronger before the Slime form is unlocked and returns to its standard difficulty afterward.
## Ascension System
Completing the game now adds permanent difficulty modifiers to subsequent playthroughs.
- 1 clear: 20% less experience gained
- 2 clears: Enemies gain 40% more health
- 3 clears: Enemies deal 20% more damage
- 4 clears: Enemies attack 20% faster
These effects are cumulative.
## Boss and Combat Improvements
- Improved the Mother Core’s animations and combat effects.
- Improved the fourth boss’s visuals, stretching-arm attack, and impact effects.
- Refined the sixth boss’s arena attacks and animation transitions.
- Added dedicated animations and electric effects for the seventh boss.
- Improved the Elite Ogre’s animations and attack effects.
- Fixed several bosses not receiving the correct Ascension health, damage, or attack-speed modifiers.
- Bosses 1 and 2 retain their original animation style.
## Progression and Quality-of-Life Improvements
- The tutorial’s grappling step now advances only after successfully using the grappling mechanic.
- Improved the default English display and several tutorial messages.
- Added a recovery prompt for certain progression-save errors.
- Improved the reliability of run progress and permanent unlock saves.
## WebGL Improvements
- Fixed a texture-compression issue that caused certain visuals to display incorrectly in WebGL.
- Improved build and loading behavior for itch.io browser play.
- Improved persistent save handling in browser environments.
Existing save data is preserved. New permanent unlocks, ending completion, and Ascension progress are stored separately.