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92% positive of 55 · Very Positive · Live from Steam
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Welcome to Your Immune System is an addictive retro arcade-style video game where you defend human cells from invading bacteria. Use all the weapons in your arsenal from macrophages, killer T cells, to cytokines and learn how these work in real life.
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What changed on Steam for this game since we started following it: prices and sales, builds, name, release date and review score.
Review score: 92% on 2026-11-01 → 92% today (55 reviews)
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Works, but may need extra effort. Results from Valve's own testing.
Every build released on Steam for this game since we started tracking it, with the developer's patch notes. Updated within minutes of each new build.