The product you are looking for is the official Betrayal at the Neibolt House: The Evil of Pennywise expansion, which requires the Betrayal at House on the Hill 3rd Edition base game to play.
Key Features and Content
This expansion is inspired by the It Chapter Two film and Stephen King's iconic novel, drawing players back to Derry, Maine, 27 years later to confront the entity known as It.
Five New Haunts: The expansion features five unique, heart-pounding scenarios. Three of the haunts follow the classic Betrayal format with one player becoming a traitor, while two of the haunts are fully cooperative, with all players working together to defeat the monster.
New Components: The box includes:
3 highly detailed character miniatures (Pennywise in clown form, Pennywise in spider form, and Henry Bowers).
4 new room tiles that are unique to the expansion: Ancient Den, Darkened Hallway, Old Well, and Winding Tunnels.
10 new "Pennywise Encounter" cards, which are drawn when a character enters an Omen room, infusing the threat of Pennywise throughout the entire game.
Henry Bowers character board overlay and other tokens.
Gameplay Experience: Reviewers find the expansion entertaining and well-made,