Halloween Secrets: Mystery F2P is an engaging hidden object adventure game set in a haunted university. Players follow protagonists Casey and Ryan as they investigate a series of supernatural occurrences tied to six cursed carnival masks. The game emphasizes exploration and puzzle-solving, inviting users to search various locations such as an old theater and abandoned classrooms for clues. Each mask reveals a fragment of Blackwood's dark history, adding depth to the narrative as players piece together the mystery.

The gameplay features a blend of interactive hidden object scenes, mystery puzzles, and cinematic storytelling. Players must solve riddles and utilize discovered items in creative combinations to unlock new areas and advance the plot. With a focus on investigation rather than jump scares, Halloween Secrets offers a unique experience that combines horror elements with intriguing gameplay, making it a must-try for puzzle enthusiasts.