Knock-knock — cheap CD keys, compare prices
Is it worth buying?
- Reviews are solid. (Metacritic 57 · Steam 87%)
- The price is above its low (was €1.48), but within a reasonable range. Notify me on a drop →
Estimate based on public reviews (Metacritic/Steam) and price history — the final call is yours.
About the game
An atmospheric horror adventure set in a remote forest cabin, where the latest Lodger notices eerie changes in familiar surroundings. It blends exploration, dread, and surviving the night as something strange emerges from the woods.
Did you know?
Developed and published by Russian studio Ice-Pick Lodge, known for unconventional, experimental games like the Pathologic series.
Best price today
€1.99
all-time low: official €1.99 · keyshop €1.48 (+34%)
The cheapest Knock-knock key right now costs €1.99 at Steam — the best of 8 compared offers. The lowest price we have recorded for this game: €1.48.
The average low over the past 5 months was €3.04.
Prices as of
Steam best price Official store
Gog Official store
Fanatical Official store
No offers match these filters — try widening them.
Listed seller price shown — payment fees may vary by method.
Knock-knock prices by store 8
| Store | Type | Price |
|---|---|---|
| Steam | Official store | €1.99 |
| Gamivo | Marketplace | €3.17 |
| Kinguin | Marketplace | €3.46 |
| Driffle | Marketplace | €3.63 |
| G2A | Marketplace | €4.26 |
| K4G | Marketplace | €5.74 |
| Gog | Official store | €8.92 |
| Fanatical | Official store | €9.99 |
Lowest — official stores
€1.99
Oct 2026
Lowest — keyshops
€1.48
Jul 2026
Price history
last 89 daysMonthly price lows
| Month | Lowest official | Lowest keyshop |
|---|---|---|
| Oct 2026 | €1.99 | €3.17 |
| Sept 2026 | €8.57 | €3.17 |
| Aug 2026 | €8.54 | €2.05 |
| Jul 2026 | €8.71 | €1.48 |
| Jun 2026 | €9.99 | €6.51 |
Lowest in-stock price per month from our price history; the current month is the low so far.
How to activate your key
- Steam key — open the Steam client → Games → Activate a Product on Steam → enter the key. Stores with this activation: Steam, Gamivo, Kinguin, Driffle, G2A, K4G, Fanatical
- GOG key — on GOG.com → Redeem a code (or in GOG Galaxy: Add games & friends → Redeem GOG code). Stores with this activation: Gog
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All-time low so far: €1.48
System requirements
| Minimum | |
|---|---|
| OS | Windows XP or later |
| Graphics | GPU that supports shader model 2.0 |
| Storage | 700 MB available space |
Similar games
Video reviews
34:12 KNOCK KNOCK MOVIE REVIEW | Double Toasted
Double Toasted
6:03 KNOCK KNOCK KNOCK Kritik Review (2024)
Robert Hofmann
3:45 KNOCK KNOCK Kritik Review (2015)
Robert Hofmann
Reviews are made and published by independent YouTube channels; they load only on click.
About this game — FAQ
Can Knock-knock be played single-player?
Yes, Knock-knock is a single-player game.
Does Knock-knock support a controller/gamepad?
Yes, Knock-knock has full controller support.
What languages does Knock-knock support?
Knock-knock is available in: English, German, Polish, Russian, Japanese.
FAQ
Where is the cheapest place to buy a Knock-knock key?
The cheapest Knock-knock key is currently sold by Steam for €1.99. That is the best of 8 offers we compare; prices are refreshed regularly. The lowest price we have ever recorded for this game: €1.48.
How much does Knock-knock cost?
Knock-knock currently costs from €1.99 — the cheapest offer across the stores we track.
Is Steam an official store or a keyshop?
Steam is an official store — keys come directly from the publisher or an authorized distributor.
Are keys from these stores legal?
Buying is legal — keys come from the grey market, so a small deactivation risk exists. So before paying, check the seller's buyer protection.
Which key region should I pick?
Global activates everywhere. Regional keys (Europe, North America, RU-CIS) only work on accounts from that region — use the Region filter to match your account.
What is an activation platform?
The service where the key activates — Steam, GOG, Epic or the publisher's platform. A key for one platform won't work on another, hence the separate filter.
What's the difference between editions?
Standard is the base game; Deluxe usually adds an expansion or bonus content. The edition filter shows exactly that variant, with no mixed prices.