Compare Knock-knock prices across trusted key stores and find the best deal. Developed by Ice-Pick Lodge. Published by Ice-Pick Lodge. Released on 10/4/2013. Available on PC, Mac, Linux. Genres: Adventure, Casual. Metacritic score: 57/100.

If you have patience for a horror game that refuses to explain itself, Knock-knock is one of the most unsettling 3-4 hours you can spend on PC. If you want clear rules and feedback loops, run.

I went into Knock-knock expecting a tight little indie horror game and came out the other side genuinely unsure whether I found it brilliant or maddening -- probably both, and that tension is exactly what Ice-Pick Lodge was going for. You play as the Lodger, a jittery insomniac scientist who wanders a procedurally shuffled house each night, turning on lights, finding antique clocks shaped like his own silhouette to push time toward dawn, and hiding behind furniture whenever the Guests arrive. Those are the mechanics in full. No combat, no inventory, no upgrade path. The game never tells you any of this outright. The light system is where things get genuinely clever. Lit rooms let you interact with clocks and hiding spots, but lighting up more of the house also accelerates how fast the Guests appear. Hiding behind furniture rewinds the clock, dragging the night out longer. So the core tension is a constant push-and-pull: light up enough rooms to find the clock and progress time, but not so many that you invite a rush of creatures you can't avoid. The Lodger also has an eye condition that forces a brief pause after each light switch -- a small mechanical detail that keeps the pace from feeling cheap. The Guests themselves are varied enough to stay memorable: a Doppelganger that can speak and will cheerfully switch off your lights, a Weeping One that functions as a story delivery device, and things that exist mostly as audio and dread. Where Knock-knock earns its reputation is atmosphere, and where it loses people is everything adjacent to atmosphere. The hand-drawn visuals have a scratchy, Tim Burton-adjacent quality that commits fully to the mood. The sound design is exceptional -- whispers and creaks carry genuine narrative content if you pay attention, and there are two distinct voice presences (one demonic, one deceptively gentle) that give you contradictory hints. The story itself is doled out through the Lodger's room-by-room monologues and diary pages across multiple nights, but the narrative is intentionally oblique to the point where some players will find meaning and others will find irritating vagueness. Critics split hard on this: Metacritic sits at 57 while Steam users have landed at 89% positive. The divide tracks almost perfectly with how much tolerance a player has for a game that treats opacity as a feature. The honest problems: the core loop does not evolve much. After the first hour the creature count feels limited, the room layouts loop visually even if the procedural shuffling keeps things functionally different, and the absence of any mechanical guidance tips from atmospheric into frustrating on a regular basis. The mid-game introduction of a persistent sanity meter adds stakes but was reportedly confusing to most players because its rules are, true to form, not explained. If you need a game to confirm your progress or reward mastery with visible feedback, this will exhaust you before the credits roll. For a very specific type of player -- someone who liked the slow dread of Pathologic, someone who treats figuring out the rules as part of the experience, someone who can sit with unresolved horror imagery and feel satisfied rather than cheated -- Knock-knock does something few games attempt and mostly gets away with it. The atmosphere is the content. Curiosity is the stated design engine, and Ice-Pick Lodge said as much directly. Go in knowing that, and your chances of getting something out of it improve considerably. Alex, Scout Team

Knock-knock

Knock-knock

Oct 4, 2013Ice-Pick Lodge
GamerScout Says

If you have patience for a horror game that refuses to explain itself, Knock-knock is one of the most unsettling 3-4 hours you can spend on PC. If you want clear rules and feedback loops, run.

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ProtonDB Platinum
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GamerScout Verdict

Worth it for players who treat figuring out obscure rules as part of the fun; frustrating dead end for everyone else.

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About Knock-knock

I went into Knock-knock expecting a tight little indie horror game and came out the other side genuinely unsure whether I found it brilliant or maddening -- probably both, and that tension is exactly what Ice-Pick Lodge was going for. You play as the Lodger, a jittery insomniac scientist who wanders a procedurally shuffled house each night, turning on lights, finding antique clocks shaped like his own silhouette to push time toward dawn, and hiding behind furniture whenever the Guests arrive. Those are the mechanics in full. No combat, no inventory, no upgrade path. The game never tells you any of this outright. The light system is where things get genuinely clever. Lit rooms let you interact with clocks and hiding spots, but lighting up more of the house also accelerates how fast the Guests appear. Hiding behind furniture rewinds the clock, dragging the night out longer. So the core tension is a constant push-and-pull: light up enough rooms to find the clock and progress time, but not so many that you invite a rush of creatures you can't avoid. The Lodger also has an eye condition that forces a brief pause after each light switch -- a small mechanical detail that keeps the pace from feeling cheap. The Guests themselves are varied enough to stay memorable: a Doppelganger that can speak and will cheerfully switch off your lights, a Weeping One that functions as a story delivery device, and things that exist mostly as audio and dread. Where Knock-knock earns its reputation is atmosphere, and where it loses people is everything adjacent to atmosphere. The hand-drawn visuals have a scratchy, Tim Burton-adjacent quality that commits fully to the mood. The sound design is exceptional -- whispers and creaks carry genuine narrative content if you pay attention, and there are two distinct voice presences (one demonic, one deceptively gentle) that give you contradictory hints. The story itself is doled out through the Lodger's room-by-room monologues and diary pages across multiple nights, but the narrative is intentionally oblique to the point where some players will find meaning and others will find irritating vagueness. Critics split hard on this: Metacritic sits at 57 while Steam users have landed at 89% positive. The divide tracks almost perfectly with how much tolerance a player has for a game that treats opacity as a feature. The honest problems: the core loop does not evolve much. After the first hour the creature count feels limited, the room layouts loop visually even if the procedural shuffling keeps things functionally different, and the absence of any mechanical guidance tips from atmospheric into frustrating on a regular basis. The mid-game introduction of a persistent sanity meter adds stakes but was reportedly confusing to most players because its rules are, true to form, not explained. If you need a game to confirm your progress or reward mastery with visible feedback, this will exhaust you before the credits roll. For a very specific type of player -- someone who liked the slow dread of Pathologic, someone who treats figuring out the rules as part of the experience, someone who can sit with unresolved horror imagery and feel satisfied rather than cheated -- Knock-knock does something few games attempt and mostly gets away with it. The atmosphere is the content. Curiosity is the stated design engine, and Ice-Pick Lodge said as much directly. Go in knowing that, and your chances of getting something out of it improve considerably.

Alex
Alex · Scout Team

Catch-all

Tags

singleplayerachievementscontroller-supporttrading-cardstier:sub-5Insomnia HorrorClock MechanicProcedural HouseLight ManagementSanity MeterNo TutorialsArt-Game HorrorUnreliable Narrator

System Requirements

Minimum

OS
Windows XP or later
Storage
700 MB available space
Graphics
GPU that supports shader model 2.0

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Reviews & Ratings

Metacritic
57

Game Info

Developer
Ice-Pick Lodge
Publisher
Ice-Pick Lodge
Release Date
Oct 4, 2013

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Knock-knock is available on PC, Mac, Linux.

When was Knock-knock released?

Knock-knock was released on 4 October 2013.

Who developed Knock-knock?

Knock-knock was developed by Ice-Pick Lodge.

Is Knock-knock worth buying?

Knock-knock holds a Metacritic score of 57/100, making it one of the standout Adventure titles. See the full reviews, ratings and how-long-to-beat times on this page to decide.