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Infectious
Play as a lethal virus infecting various organs in your host's body while trying to outsmart the immune cells that seek to eliminate you and your kind. Generate clones and watch them propagate, infecting cells and taking down bosses.
What players say
Steam review score and the most-helpful voices, which may include critical ones. Score via Steam as of 2026-09-28.
“good game a littile small tho”
— a player, Steam review · 17 hrs playedLatest official news
Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.
Update Notes for 30th Apr
New updates are here! With chain infection bonus reward and tracker, you can now witness the diligence of your clones in action and receive bonus rewards from their hard work! With each successful cha
Update Notes 3rd Jan 2024
Bug fixes and game improvement include: 1. Windows mode enabled for non-full screen. 2. Option button added to enable change of setting (auto-pause) while playing. 3. Achievement bug resolved.
Small Update
- Improved game performance. - Reduced game difficulty for Stage 2 Boss Level. - Minor debugging.
New Content Update
The current update comes with a new pathogen, Entamoeba, a parasitic protozoa that feeds on cells. Take control of your reproduction via cell division and generate clones out of the reach of immune ce
New Update
This new update will add about 30-45 minutes of play time. Added: 1. Additional enemy unit types and boss levels. Fixes: 1. Improved loading time between levels and upgrade. 2. Minor touch-up and impr
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Screenshots
Official Steam store screenshots — click any shot to enlarge.
Facts & details
From the Steam store record, snapshot 2026-09-28.
| Genres | Action, Indie, Simulation |
| Player tags | Outbreak Sim · Survival Horror · Simulation · Science · Stealth · Runner · Realistic · Atmospheric · Arcade · Survival · Hand-drawn · Casual (SteamSpy community voting) |
| Features | Single-player · Partial Controller Support · Steam Cloud · Family Sharing |
| Languages | English * , German, Russian * |
Minimum system requirements (PC)
Minimum: Requires a 64-bit processor and operating system OS *: Windows 7 Processor: 2.0 GHz Dual Core Processor Memory: 1 GB RAM Graphics: Integrated Graphics (512MB) Storage: 300 MB available space