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Project Subtrahend

Project Subtrahend is a choose-your-own-adventure visual novel, where you have the chance to get to know the stories, lore, and personalities of nine unique characters. Choices matter in this game, and it's up to you who lives or dies as you explore what it means to be human.

OfficialDec 1, 2023 · LilyDynamiteCasualIndieFamily SharingSingle-playerSteam AchievementsWindows · Mac · Linux

Current best

$3.99

at Steam · Jul 12

All-time low

$3.99

Jul 12, 2026

Stores tracked

1

sources indexed

Review signal

No reviews

Project Subtrahend cover

Current best · Steam

$3.99

Observed Jul 12

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

Project Subtrahend · Region US · Jul 12

$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 12, 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 Project Subtrahend cheapest right now?

Project Subtrahend 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 Project Subtrahend?

The indexed low for Project Subtrahend is $3.99 from Steam, observed Jul 12, 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?

No review summary is indexed for this game yet.

Can KeyDwarf notify me about a lower price?

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