Knock-knock is one of those rare games that gets under your skin in a way that's genuinely hard to articulate — it's less a horror game and more an interactive state of agitation, the kind of skin-crawling unease that mirrors actual insomnia rather than cheap jump scares. The deliberately opaque mechanics and unexplained rules are a feature, not a bug; figuring out how the Lodger's world operates is half the experience, and stumbling through it blind feels strangely appropriate for a game about a man losing his grip on reality. That said, the heavy reliance on RNG can feel punishing — enemies spawning directly on top of you or blocking the only exit is genuinely frustrating, and the repetitive room-to-room gameplay wears thin by the later levels. The art style, sound design, and pervasive atmosphere of wrongness are exceptional, and the multiple endings give it real replay value if you can stomach starting over. I'd recommend it specifically to patient players who enjoy experimental, mood-driven experiences — just don't expect clarity, and accept that the confusion is the point.

I saw it on YouTube once and was afraid to play it. I finally got around to it, and let me tell you – it really has a great atmosphere. The game doesn't tell you everything; it's even hard to guess what the plot is about. There's a lot of interpretation, but the mechanics are simple. I recommend it; the game isn't scary in the serious sense – you might get a little carried away, but it's only a matter of time. The monsters then become more annoying than scary. I recommend buying it on sale.