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Calculus of Rot

Fight your way through zombie-infested wastelands in a turn-based tactical survival game. Reveal the map tile by tile, manage your health, choose your battles wisely, and survive against increasingly dangerous mutants lurking in the darkness.

OfficialJul 11, 2026 · Kazakov StudiosAdventureFamily SharingSingle-playerWindows

Current best

$2.99

at Steam · 27h ago

All-time low

$2.99

Jul 19, 2026

Stores tracked

1

sources indexed

Review signal

100%

5 reviews

Calculus of Rot cover

Current best · Steam

$2.99$4.99−40%

Observed 27h ago

View best listing

Current low target

$2.99 · matches the current indexed low

KeyDwarf only tracks observations — checkout happens on the store.

Tracked Stores

Best indexed price $2.99 at Steam.

1/1
S

Steam

BestOfficialIn stock

Calculus of Rot · Region US · 27h ago

$2.99

was $4.99 · −40%

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 $2.99
Best observed priceAll-time low

All-time low

$2.99

Jul 19, 2026 · Steam

12-week avg

$2.99

1 recent observations

Current vs low

At low

Current $2.99

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

10 indexed

Common Questions

Where is Calculus of Rot cheapest right now?

Calculus of Rot is currently indexed at $2.99 from Steam. Publisher, direct storefront, or authorized retail source. Check the linked store's current terms before acting.

What is the historical low for Calculus of Rot?

The indexed low for Calculus of Rot is $2.99 from Steam, observed Jul 19, 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?

Calculus of Rot has a best indexed review signal of 100%.

Can KeyDwarf notify me about a lower price?

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