The phrase refers to a modified application package (APK) of a fan-made horror game for the Android operating system. The game typically involves surviving a series of nights while evading animatronic characters. This particular iteration is often characterized by its unofficial status and availability through third-party sources, rather than official app stores.
Such modified files provide access to content potentially unavailable through conventional channels. Historically, these files have gained traction among users seeking modified features, circumventing in-app purchases, or accessing games not officially released in their region. The appeal lies in gaining additional functionality or content without adhering to standard distribution models.