This is a prequel to Hello Neighbor

https://store.steampowered.com/app/521890/Hello_Neighbor/

Hello Neighbor: Hide and Seek follows the tragic story of the Neighbor’s family in this dramatic prequel to Hello Neighbor. Experience playing a game of hide-and-seek with your brother as you both deal with the loss of a family member. The game explains events that lead up to the original Stealth Horror hit Hello Neighbor.