Steam
BestOfficialIn stock31st prototype · Region US · Jul 16
$1.99
31st prototype
This is a steampunk puzzle game. player use ↑↓←→to control the robot,press Z/ENTER/SPACE to explore the map, and press X/ESC to save game The frame is sketch style, let you immerse the retro atomospher.
OfficialMay 4, 2021 · STEAM STREETAdventureFamily SharingSingle-playerWindows
Current best
$1.99
at Steam · Jul 16
All-time low
$1.59
Jul 9, 2026
Stores tracked
1
sources indexed
Review signal
100%
17 reviews
Current best · Steam
$1.99
Observed Jul 16
View best listingObserved low target
$1.59 · based on the previous indexed low
KeyDwarf only tracks observations — checkout happens on the store.
Tracked Stores
Best indexed price $1.99 at Steam.
1/1
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
2 observationsBest observed priceAll-time low
All-time low
$1.59
Jul 9, 2026 · Steam
12-week avg
$1.79
2 recent observations
Current vs low
+25%
Current $1.99
Recommendation
Fair indexed price
not far from the low
Lowest indexed daily price per currency. KeyDwarf tracks listings and does not sell keys.
Media
11 indexedCommon Questions
Where is 31st prototype cheapest right now?
31st prototype is currently indexed at $1.99 from Steam. Publisher, direct storefront, or authorized retail source. Check the linked store's current terms before acting.
What is the historical low for 31st prototype?
The indexed low for 31st prototype is $1.59 from Steam, observed Jul 9, 2026. The current indexed price is 25% above that low, so KeyDwarf labels it "Fair indexed price".
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?
31st prototype has a best indexed review signal of 100%.
Can KeyDwarf notify me about a lower price?
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