Steam
BestOfficialIn stockRadiation Island · Region US · Jul 13
$9.99
Radiation Island
Radiation Island is a survival adventure game where you craft your own destiny in a huge open world environment. As part of the Philadelphia Experiment you have become stranded in a parallel, alternate reality. Discover this new and mysterious world, with all its surprises.
OfficialNov 29, 2016 · Atypical GamesActionAdventureIndieFamily SharingFull controller supportWindows
Current best
$9.99
at Steam · Jul 13
All-time low
$1.99
Jun 26, 2026
Stores tracked
1
sources indexed
Review signal
81%
635 reviews
Current best · Steam
$9.99
Observed Jul 13
View best listingObserved low target
$1.99 · based on the previous indexed low
KeyDwarf only tracks observations — checkout happens on the store.
Tracked Stores
Best indexed price $9.99 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
3 observationsBest observed priceAll-time low
All-time low
$1.99
Jun 26, 2026 · Steam
12-week avg
$7.32
3 recent observations
Current vs low
+402%
Current $9.99
Recommendation
Watch for drop
consider setting an alert
Lowest indexed daily price per currency. KeyDwarf tracks listings and does not sell keys.
Media
12 indexedCommon Questions
Where is Radiation Island cheapest right now?
Radiation Island is currently indexed at $9.99 from Steam. Publisher, direct storefront, or authorized retail source. Check the linked store's current terms before acting.
What is the historical low for Radiation Island?
The indexed low for Radiation Island is $1.99 from Steam, observed Jun 26, 2026. The current indexed price is 402% above that low, so KeyDwarf labels it "Watch for drop".
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?
Radiation Island 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.