FNAF Security Breach: Unreal Play Studio (often abbreviated as SBUPS by the community) is a fan-made toolkit and sandbox environment built in Unreal Engine 4/5. Unlike the official Security Breach game, which is a fixed survival-horror experience, SBUPS is designed as a creative platform. Its primary goal is to allow users—whether experienced 3D artists or complete beginners—to build, animate, and play inside their own versions of the Mega Pizzaplex.

The keyword "Unreal Play Studio" highlights the technology driving these fan games. Unlike the original Security Breach, which ran on a modified version of Unreal Engine 4, these new fan projects are utilizing Unreal Engine 5.3 or 5.4.

Here is why that matters for the Pizzaplex:

Five Nights at Freddy’s: Security Breach serves as a pivotal example of a franchise evolving alongside its technology. By adopting Unreal Engine, Steel Wool Studios moved FNAF from the realm of "survival strategy" to "survival horror action." Despite technical shortcomings, the game successfully proved that the franchise could survive the transition to a fully 3D, navigable world, setting a precedent for future survival horror titles developed on the Unreal platform.

While the exact feature set has evolved through community updates, the core pillars of the project typically include:

Forget the mission timers. In the Unreal Play Studio, you are simply dropped into the center of the Pizzaplex. You can walk into Sunrise’s daycare, ride the Fazer Blast escalator, or hide in Sister Location’s bunker (if the modder added it) with zero pressure.

Like many ambitious fan projects, SBUPS has faced hurdles: