
Screenshots

Watch trailer on Steam ↗Leukocyte
Víctor Martínez · Published by Víctor Martínez
Last updated 28 Sept 2026
Action-adventure game for solo play or with friends. Fight viruses and bacteria, gain DNA mutations, and develop new abilities as you explore the human body and face challenging bosses.
Action, Adventure, Indie · More free games
About this game
Leukocyte is an action-adventure game set inside the human body.
You are a white blood cell and part of the immune system. Your mission is to protect the body from viruses, bacteria, and other dangerous threats.
Explore different areas of the body, complete objectives, rescue allies, gather resources, and evolve your abilities through DNA mutations. Mutations can change the way you play and help you survive increasingly dangerous infections.
Battle hordes of enemies, defeat powerful bosses, and uncover secrets hidden throughout the body.
Features:
• Play solo or with up to 4 players in local co-op.
• Explore multiple regions of the human body.
• Evolve through DNA mutations.
• Fight viruses, bacteria, and unique bosses.
• Gather and manage valuable resources.
• Discover hidden areas, secrets, and special encounters.
• Choose from multiple difficulty levels.
• Learn about how the human body works while you play.
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows 10 64-bit
- Processor: Intel Core i5
- Memory: 8 GB RAM
- Graphics: DirectX 11 compatible GPU
- DirectX: Version 11
- Storage: 2 GB available space
Recommended
- Requires a 64-bit processor and operating system
- OS: Windows 10/11 64-bit
- Processor: Intel Core i5
- Memory: 8 GB RAM
- Graphics: NVIDIA GTX 750 Ti / GTX 950
- DirectX: Version 11
- Storage: 2 GB available space
Supported Languages
Latest news
Patch NotesOfficial
Update: Custom Key Remapping & Gameplay Improvements
Custom Controls & Gameplay ImprovementsA new update for Leukocyte Demo is now available!This release focuses on making the game easier to learn, more comfortable to play, and more flexible for different keyboard layouts.Fully Customizable Keyboard ControlsYou can now remap every gameplay key directly from the Controls menu.Whether you use QWERTY, AZERTY, QWERTZ, or simply prefer your own layout, you can now configure the controls the way you like.Fully customizable keyboard bindingsKeyboard & mouse controls are now available. Move with your preferred keys while using the left mouse button to fire toxins and the right mouse button to shake or create a protective bubble.Changes are saved automaticallyOne-click option to restore the default layoutTutorial prompts now display your actual assigned keysImproved OnboardingThe first minutes of the game have been reworked to better explain its mechanics without interrupting the action.This includes:Clearer mission briefingImproved tutorial flowBetter interaction dialogue with Andi, Dart and PhagoMore contextual gameplay hintsQuality-of-Life ImprovementsThis update also includes a variety of smaller improvements and fixes throughout the demo to make the overall experience smoother.As always, thank you for playing Leukocyte and for all the feedback you've shared. Every update helps make the game better.Read full article on Community Announcements (Leukocyte)Patch NotesOfficial
Major Gameplay & Tutorial Improvements
Hello everyone!Over the last few weeks I've been working on one goal: helping new players understand Leukocyte without reducing the challenge.Many players enjoyed the mechanics once they understood them, so this update focuses on presenting those mechanics much more clearly.What's new?Completely redesigned mission briefings presentation before each operation.New tutorial flow that introduces mechanics naturally as you play.Clearer mission objectives and progression.Many new dialogue lines for Sergeant Andi, making objectives and gameplay easier to understand.New interactions and dialogue for Dart and Phago, giving each character more personality.Improved in-game guidance during exploration and combat.Better explanations for important mechanics such as toxins, oxygen, shaking, disguises and other survival systems.Numerous text improvements and localization updates across all supported languages.General gameplay polish, bug fixes and quality-of-life improvements.The game is still designed to be challenging, but now it should be much easier to understand what is happening and what your objectives are.Thanks to everyone who has tried the demo and shared feedback. It has helped shape this update, and there's plenty more to come!See you inside the bloodstream! 🩸Read full article on Community Announcements (Leukocyte)AnnouncementsOfficial
A Better Beginning for New White Blood Cells
A New BeginningThanks to everyone who has played the Leukocyte demo and shared their feedback.One piece of feedback came up again and again: while Leukocyte's mechanics are unique, the first few minutes could be easier to understand.With that in mind, I've added a brand-new introductory level designed to help new white blood cells learn the basics before facing the dangers waiting inside the human body.Meet ANDIIn this new opening section, ANDI will guide you through the core mechanics step by step, introducing movement, combat, and other essential abilities in a more natural way.Whether you're discovering Leukocyte for the first time or you've already tried the demo, this new beginning should make your journey smoother while keeping the challenge ahead intact.What's Next?This is just the beginning. I'll continue improving the game based on your feedback as development moves forward.Thank you for helping make Leukocyte a better game. ❤️Read full article on Community Announcements (Leukocyte)Patch NotesOfficial
Minor Update: Controls & Gameplay Improvements
Minor Update: Controls & Gameplay ImprovementsHello everyone!Thank you to everyone who has played the Leukocyte Demo and shared feedback. This update focuses on improving the controls and overall user experience.What's NewAdded mouse support throughout the menus.Improved menu navigation and input handling.Added WASD support for keyboard players.Space remains the default key for toxin release.B remains the default key for Shake.The Pause button has been remapped on Xbox and PlayStation controllers to the standard Menu/Options (three-line) button.Fixed several minor bugs and gameplay issues.Coming SoonI'm currently reworking the tutorial to better explain the game's mechanics and make the game easier to understand for new players.I'm also working on adding fully customizable keyboard controls, allowing players to remap keys to their preferred layout.Thank you for playing Leukocyte and for taking the time to leave feedback. Every suggestion helps improve the game!Read full article on Community Announcements (Leukocyte)






