Steam
BestOfficialIn stockDefense Builder · Region US · Jul 26
$12.99
Defense Builder
Defense Builder is a sci-fi tower defense game. Players can build various defense towers to resist enemy attacks. There are as many as 36 types of available units, and it features a highly free economic system and defense system.
OfficialJan 23, 2025 · AriesStrategyFamily SharingSingle-playerWindows
Current best
$12.99
at Steam · Jul 26
All-time low
$10.39
Jul 14, 2026
Stores tracked
1
sources indexed
Review signal
71%
45 reviews
Current best · Steam
$12.99
Observed Jul 26
View best listingObserved low target
$10.39 · based on the previous indexed low
KeyDwarf only tracks observations — checkout happens on the store.
Tracked Stores
Best indexed price $12.99 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
$10.39
Jul 14, 2026 · Steam
12-week avg
$11.69
2 recent observations
Current vs low
+25%
Current $12.99
Recommendation
Fair indexed price
not far from the low
Lowest indexed daily price per currency. KeyDwarf tracks listings and does not sell keys.
Media
12 indexedCommon Questions
Where is Defense Builder cheapest right now?
Defense Builder is currently indexed at $12.99 from Steam. Publisher, direct storefront, or authorized retail source. Check the linked store's current terms before acting.
What is the historical low for Defense Builder?
The indexed low for Defense Builder is $10.39 from Steam, observed Jul 14, 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?
Defense Builder has a best indexed review signal of 71%.
Can KeyDwarf notify me about a lower price?
Use the alert target control on this page to save a watch target after sign-in.