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Systematic Immunity

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.

OfficialMay 20, 2016 · Hedge Knight GamesActionAdventureIndieFamily SharingFull controller supportWindows

Current best

$3.99

at Steam · Jul 4

All-time low

$3.99

Jul 4, 2026

Stores tracked

1

sources indexed

Review signal

81%

27 reviews

Systematic Immunity cover

Current best · Steam

$3.99

Observed Jul 4

View best listing

Current low target

$3.99 · matches the current indexed low

KeyDwarf only tracks observations — checkout happens on the store.

Tracked Stores

Best indexed price $3.99 at Steam.

1/1
S

Steam

BestOfficialIn stock

Systematic Immunity · Region US · Jul 4

$3.99

View listing
How trust is scored: KeyDwarf combines source type, known retailer posture, marketplace risk, activation-region warnings, and source transparency. Checkout and support still happen with the external seller.

Price History

1 observations
Low $3.99
Best observed priceAll-time low

All-time low

$3.99

Jul 4, 2026 · Steam

12-week avg

$3.99

1 recent observations

Current vs low

At low

Current $3.99

Recommendation

At indexed low

current indexed price matches the low

Lowest indexed daily price per currency. KeyDwarf tracks listings and does not sell keys.

Media

12 indexed

Common Questions

Where is Systematic Immunity cheapest right now?

Systematic Immunity is currently indexed at $3.99 from Steam. Publisher, direct storefront, or authorized retail source. Check the linked store's current terms before acting.

What is the historical low for Systematic Immunity?

The indexed low for Systematic Immunity is $3.99 from Steam, observed Jul 4, 2026. The current indexed price is at that low, so KeyDwarf labels it "At indexed low".

Is the top source safe?

Steam is labeled "Official store" in the index. KeyDwarf tracks the listing and source risk, but checkout and support stay with the external store.

What is the review signal?

Systematic Immunity has a best indexed review signal of 81%.

Can KeyDwarf notify me about a lower price?

Use the alert target control on this page to save a watch target after sign-in.