Hello Neighbor is a stealth horror game developed by Dynamic Pixels and published by tinyBuild. Initially released as public alphas from 2016 to 2017, it received a full release for Windows and Xbox One on 8 December 2017, and later for PlayStation 4, Nintendo Switch, iOS, and Android on 26 July 2018.

The players controls Nicky Roth, who witnesses strange happenings at the house of his next-door neighbor, Theodore Peterson. His goal is to successfully sneak into the basement of the house to uncover a dark secret while avoiding being caught by Theodore. One of the main selling points of the game was the neighbor's artificial intelligence (AI) that changed behavior based on the player's past actions, such as setting bear traps along the player's path in a previous attempt, putting water bucket traps above doors the player has used, and setting up surveillance cameras in areas the player has consistently visited.

While the initial alpha versions of Hello Neighbor were received positively, the final product was met with largely negative reviews. The game-play, puzzles, control scheme, and technical performance have been heavily criticized; but the story elements and characters, were praised. The game spawned a franchise, beginning with a prequel, Hello Neighbor: Hide and Seek, released in December 2018. Two multiplayer spin-offs, Secret Neighbor and Hello Engineer, were released in October 2019 and October 2021, respectively. A standalone sequel, Hello Neighbor 2, was released on 6 December 2022.