You wake up in a room you don’t recognize. No windows. No way out. Just a door… and the unsettling feeling that someone —or something— is watching you.

In Knock Again, you must knock on the door to earn money, upgrade your abilities, and… keep knocking. It sounds simple, almost absurd. But with each passing day, the room changes. The invisible presence on the other side becomes harder to ignore.

This is not a normal clicker. It’s a psychological horror game where mechanical progress hides something dark, twisted, and uncomfortable. Monotony distorts. Logic breaks. And all you can do is keep knocking, hoping it brings you closer to the truth… or at least keeps whatever’s on the other side away.

How far are you willing to go to escape?