Knock-knock
All offers (10)
Compare the platform, region and delivery before you buy.
Standard Edition 10 offers · EU & Global
Knock-KnockActivation keySteamEuropeLowest price€2.49View deal
Knock-knock PC Steam CD KeyActivation keySteamGlobal€2.99+ payment feeView deal
Knock-Knock EN/DE/PL/JA/RU GlobalActivation keySteamGlobal€3.10+ service feeView deal
Knock-Knock (PC) Steam Key - GLOBALActivation keySteamGlobal€3.10+ service feeView deal
Knock-knock (Global) (PC / Mac / Linux) - Steam - Digital KeyActivation keySteamGlobal€3.17no Plus, no ProtectView deal
Knock-knock Steam Key GLOBALActivation keySteamGlobal€3.33+ fee possibleView deal
Knock-Knock Steam Key GLOBALActivation keySteamGlobal€3.97+ service feeView deal
Knock-knock Steam KeyActivation keySteamGlobal€4.01View deal- Knock-knock EU PC Steam CD KeyActivation keySteamEurope€9.86+ payment feeView deal
- Knock-Knock Steam Gift GLOBALSteam giftSteamGlobal€10.78+ service feeView deal
Official store Steam · price for Germany
Steam store pageDirect purchaseSteamGermany€9.99No feeView on Steam
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Best price over the last 32 days
- Lowest €2.4911 Oct 2026
- Highest €2.4911 Oct 2026
- Today €2.49
The cheapest EU or Global key per day across all compared stores; the dashed line is the Steam price.
Trailer & screenshots
Buy Knock-knock key: current price comparison
Where is the Knock-knock key cheapest?
The cheapest Knock-knock key that activates in the EU currently costs €2.49 at IndieGala. Keyfinder compares 10 offers from 8 shops for this price. That is 75% less than the Steam price of €9.99. Prices are refreshed hourly; region, edition and any checkout fees are shown on each offer.
What was the lowest Knock-knock key price in the last 32 days?
€2.49 on 11 Oct 2026, for the standard edition that activates in the EU. The highest daily low in that time was €2.49 on 11 Oct 2026; today the cheapest key costs €2.49.
Which Knock-knock keys activate in the EU?
10 offers are marked EU or Global and activate in Germany and the rest of the EU. Keys for other regions are listed separately. The keys on offer are for Steam.
How do I activate the Knock-knock key?
The cheapest key activates on Steam. You redeem it there with the code the shop sends you after you pay.
Is it safe to buy a Knock-knock key from IndieGala?
Before you pay, check three things on the offer: the region (EU or Global for Germany), the edition and any fee added at checkout. Keyfinder shows all three on every offer. Our IndieGala check covers who runs the shop, its fees and its regions.
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About Knock-knock
- Developer
- Ice-Pick Lodge
- Publisher
- Ice-Pick Lodge
- Release date
- 4 Oct 2013
- Steam
- View on Steam