Five Nights at Freddy’s (FNAF) inspired games center on tense, resource-limited survival, AI-driven antagonists, and player-facing systems that communicate suspense through UI and sound. Implementing such a game in Unity benefits greatly from a clean Object-Oriented Programming (OOP) class architecture that promotes modularity, reuse, testability, and easier iteration. Below is a focused examination of OOP approaches, key classes, interactions, design patterns, and trade-offs when building a FNAF-style Unity game.