Systematic Immunity
Short description
Systematic Immunity is a challenging precision platformer set inside the human body...and not a particularly healthy one either. This body has been infected by a big, nasty bugger of a germ, who is making it his business to spawn many more germs as fast as he can.
- Developer
- Hedge Knight Games
- Publisher
- Hedge Knight Games
- Release
- Fri, May 20, 2016
- Price
- $3.99
- Reviews
- 7
- Positive
- 71%
- Followers
- 151
- Owners (estimated)
- 0 – 20K
- Concurrent players
- n/a
- Genres
- Action, Adventure, Indie
- Features
- Full controller support, Steam Trading Cards, Steam Workshop, Includes level editor
- Tags
Review count and SteamSpy's owner range agree well enough to narrow the estimate down to this band. Multiplied by the $3.99 launch price — there is not enough price history for this game to weight the copies by what they actually sold for. Before Steam's cut, VAT and refunds. How these numbers are calculated.
Waiting for Systematic Immunity to get cheaper? Name your price and we will email you when it gets there.
Media
History
2 data points since Jul 31, 2026. Gaps mean nothing changed — the value carries forward.
The revenue curve is an estimate, not a measurement. It is the only calculated series here: each interval takes the review growth of that period, multiplies it by the sales-per-review factor and by the price actually charged at the time, and adds the result to the running total. That is why it climbs more slowly through discount periods than the review curve next to it. The last point is the same figure quoted above — gross, before Steam's cut, VAT and refunds. How these numbers are calculated.
Lowest recorded price: $3.99 on Jul 31, 2026. That is the current price.
Similar games that found an audience
Games sharing at least 3 of this title's leading tags, with enough reviews to have gone somewhere. Ranked by how much they overlap, not by how big they are. − missing and + extra mark the tags each one does not share with Systematic Immunity. Studio counts the titles that developer has released — the closest thing to production scale that public data allows. It is not a budget, and nobody publishes those.
| Image | Name | Studio | Shared | Tag difference | Price | Reviews | Positive | Released | Revenue (estimated) |
|---|---|---|---|---|---|---|---|---|---|
|
Dust: An Elysian Tail | Humble Hearts LLC 2 titles | 4 | + Metroidvania + RPG | $14.99 | 14,275 | 95% | Fri, May 24, 2013 | $13.4m $13.4m – $15.3m |
|
Rogue Legacy 2 | Cellar Door Games 4 titles | 4 | + Arcade + Metroidvania | $24.99 | 14,268 | 91% | Thu, Apr 28, 2022 | $23.5m $23.5m – $26.8m |
|
Deadlight | Tequila Works, S.L. first game | 4 | + Zombies + Post-apocalyptic | $14.99 | 9,392 | 79% | Thu, Oct 25, 2012 | $6.4m $6.4m – $9.6m |
|
SteamWorld Dig 2 | Image & Form Games 4 titles | 4 | + Metroidvania + Mining | $19.99 | 5,665 | 96% | Fri, Sep 22, 2017 | $4.1m $3.2m – $7.3m |
|
Hob | Runic Games 3 titles | 4 | + Singleplayer + Puzzle | $19.99 | 4,639 | 88% | Tue, Sep 26, 2017 | $3.7m $3.6m – $6.6m |
There are more like this. Your plan shows the 5 closest neighbours; Plus and Pro show up to 100 — enough to see the shape of a niche instead of a sample of it.