Hello Neighbor: Nicky's Diaries represents tinyBuild's dedicated mobile adaptation of the popular stealth horror franchise, delivering a purpose-built experience for handheld devices. The game positions itself as a premium mobile title in the puzzle-adventure genre, focusing on atmospheric storytelling and environmental interaction rather than porting existing console content. The core gameplay revolves around systematic exploration and puzzle-solving mechanics across multiple environments. Players must observe neighbor behavior patterns, manipulate interactive objects, and solve spatial logic puzzles to progress through the narrative. The game implements an adaptive AI system where the neighbor's patrol routes and suspicion levels change based on player actions, creating dynamic challenges that require strategic planning rather than repetitive trial-and-error approaches. User experience demonstrates thoughtful mobile optimization through intuitive touch controls for object interaction and movement, though some users report controller compatibility issues. The interface maintains minimal on-screen elements to preserve immersion, with contextual icons appearing only when interactable objects are nearby. Real-world usage patterns show strong performance during commutes or travel scenarios, with the offline capability being particularly valued according to user feedback. Review analysis reveals consistent praise for engagement value and puzzle complexity, with multiple users noting superior experience to previous series entries. Hana Saleh's May 2025 review highlights the game's offline functionality as particularly valuable for travel use cases, while Natalie Buragina's July 2025 feedback acknowledges enjoyment despite controller synchronization problems. Gianna's June 2025 review specifically appreciates the free-to-play model compared to paid console versions. The game demonstrates notable strengths in puzzle design and mobile optimization but faces limitations in control scheme consistency and occasional performance variability on older devices. Ideal for players seeking substantial puzzle challenges without requiring constant internet connectivity, though those expecting precise controller support may experience frustration. The experience delivers strongest value for mystery genre enthusiasts prioritizing cerebral challenges over action-oriented gameplay.