Hello Neighbor is a   developed by  video game studio Dynamic Pixels and published by . Initially released as public alphas from 2016 to 2017, it received a full release for  and  on 8 December 2017, and later for , ,  and  on 26 July 2018.

The player takes the role of Nicky Roth, who investigates his mysterious neighbor named Mr. Peterson. The goal of the game is to successfully sneak into the basement of the neighbor's house to uncover a dark secret while avoiding being caught by the neighbor. The game's  (AI) modifies the neighbor's behavior based on the player's past actions, such as setting traps along paths the player followed in a previous attempt.

While the initial alpha versions of Hello Neighbor were received positively by fans and critics, the final product was met with largely negative reviews. Critics panned the gameplay, control scheme, and technical performance, although some praised the story, mystery elements, and art style. Despite the negative reception, the game spawned a franchise, beginning with a prequel, Hello Neighbor: Hide and Seek, released in December 2018. A  spin-off, Secret Neighbor, was released in October 2019, and another spin-off, Hello Engineer, is scheduled for release in 2021. A sequel, Hello Neighbor 2, is also expected to release in 2021. An animated series based on the game series is also in development.