Screenshots
Watch trailer on Steam ↗Immunica
eranboi · Published by eranboi
Mostly Positive — 75% positive (48 reviews) · 9 achievements
Last updated 28 Sept 2026
Become the immune system. Hover to kill. Weapons fire automatically. Manage your research lab, hire scientists, and develop a vaccine while fighting off endless pathogen hordes.
£2.69
Lowest price we've ever recorded
View on SteamPrices can lag the live Steam store — always confirm before buying.
Price history
Indie, Strategy, Casual · 2026 · More under £5 games
Explore the strategic challenges of Immunica as you guide your immune response through waves of enemies. With eranboi at the helm, this indie strategy game invites casual players to balance combat and lab management in a unique hover shooter experience.
About this game
In Immunica, YOU are the immune system. Pathogens are flooding in. Your health is dropping. Every second counts.
Control the immune system from within. No clicking required. Just move, position, and watch the chaos unfold as your weapons automatically tear through waves of invaders.
ACTIVE SURVIVAL + IDLE PROGRESSION
Hover over enemies to deal damage. Your cursor is your primary weapon. Meanwhile, missiles lock on, beams fire, drones orbit, and burst pulses detonate around you. Focus on positioning while your arsenal handles the rest.
4 WEAPON SYSTEMS
Burst - AOE pulse centered on your cursor
Missiles - Homing projectiles that hunt down targets
Beam - High-damage laser for focused destruction
Drones - Orbiting allies that intercept incoming threats
FEVER MODE
Chain kills to build your Fever meter. When it fills, unleash devastating power: up to +500% damage across 5 escalating tiers. The more you kill, the stronger you become.
40+ PATHOGEN SPECIES
Face 8 pathogen types across multiple tiers. From tiny Prions to massive Helminths, each species brings unique behavior patterns. Every pathogen has 3 evolution levels: Normal, Mutant, and Alpha. Higher tiers mean deadlier enemies and greater rewards.
RESEARCH LAB
Between breaches, manage your own research laboratory. Collect pathogen samples from combat and assign them to your scientists. Hire interns, technicians, researchers, and senior scientists. Each has different processing speeds, efficiency rates, and capabilities. Watch your team analyze samples even while you are away. Progress continues offline for up to 8 hours.
Your goal: accumulate enough Vaccine Data to complete the cure.
DEEP UPGRADE SYSTEM
Over 200 upgrades across multiple categories. Improve your cursor damage, fire rate, and critical chance. Unlock weapon systems and enhance their power. Strengthen your core health and damage resistance. Every protein spent makes you permanently stronger.
BREACH MODIFIERS
Each run randomly selects 1-3 modifiers from 30 possibilities:
Buffs - Advantages that boost your power
Nerfs - Increased difficulty with bonus protein rewards
Weird - Strange effects that completely change how the game plays
KEY FEATURES
Satisfying incremental progression that persists across runs
Active cursor gameplay combined with automated weapons
Idle lab management with offline progression
40+ pathogen species with 3 evolution levels each
30 breach modifiers for endless variety
Hidden synergies to discover through gameplay
Work toward a final goal: completing the vaccine
System Requirements
Will my PC run this? →Minimum
- OS *: Windows 7 or newer
- Processor: 2.5Ghz or better
- Memory: 2 GB RAM
- Storage: 500 MB available space
Recommended
- Memory: 4 GB RAM
Supported Languages
Latest news
AnnouncementsOfficial
Massive Balance Overhaul: The True Incremental Experience!
Hello! Thank you so much for playing Immunica and leaving your reviews. I have read your feedback carefully, and I agree with you: the progression curve felt off. Many of you hit a wall where you maxed out all your upgrades too quickly, while the enemies kept getting stronger. This left you feeling underpowered and unable to complete the game. In an incremental game, you should feel stronger over time, not weaker. Today, I am releasing a massive balance overhaul that fixes this issue. Here is what is new: Economy & Progression Overhaul No More Early Caps: I have completely re-scaled the upgrade costs and extended the progression curve. You will no longer max out all upgrades in the first couple of hours. The progression is now much deeper, giving you continuous and meaningful goals over hundreds of runs. Massive Weapon Scaling Out-Scale the Swarm: Previously, weapon damage capped out too low compared to the late-game enemies. To fix this, I have drastically buffed the Base Damage and Upgrade Scaling of the Burst, Missiles, Drones, and Beams. Late-game weapons now scale like true ultimate weapons. If you invest in them, they will easily shred through the pathogens that used to block your path. Survival Balance Meaningful Defenses: The interaction between your Health, Armor, Resilience, and the enemies' collision damage has been reworked. With the new HP scaling and defensive tweaks, you now have the tools to survive the late-game Alpha pathogens as long as your offense keeps up. Jump back into the bloodstream, keep upgrading your arsenal, and experience the late-game progression as it was meant to be. Let me know how far you can push the numbers in the new economy. Happy purging!Read full article on Community Announcements (Zexyd)Patch NotesOfficial
Immunica is Out Now - Plus a Hotfix!
Immunica is officially live on Steam! In Immunica, you play as the immune system itself, fighting back waves of pathogens using cursor control, automated weapons, and strategic upgrades across 10 enemy tiers and 186 upgrades.I've been keeping a close eye on feedback since launch, and I've already shipped a hotfix to address some issues that were present at release.Hotfix - Bug Fixes & ImprovementsBug FixesFixed an issue where Lab upgrades were not resetting on prestigeFixed Lab Gameplay bugs: rewards now correctly trigger each phase and researchers correctly consume samples to progressQuality of LifeAdded a confirmation dialog when deleting a save fileUI updates: important information is now more prominent and easier to readAdjusted the rate at which samples dropThis is just the beginning. A balance-focused patch is already in the works. If you run into any issues or have feedback, drop it in the discussions. I read everything.Thank you for playing!Read full article on Community Announcements (Zexyd)AnnouncementsOfficial
Immunica Demo is Now Available
The immune system needs YOU.Pathogens are flooding in. Your health is dropping. Every second counts.Fight back with precise cursor control, automated weapons, and strategic upgrades. Build kill streaks, enter Fever Mode, and become unstoppable.Between breaches, manage your Research Lab. Hire scientists, assign pathogen samples, and work toward the cure. Progress continues even while you're away.The demo includes Vaccine Phases I-III. The full release will feature all 10 phases and the complete path to the final cure.Your feedback shapes the game.Read full article on Community Announcements (Zexyd)
