So You Want to Make Your Own FNAF on Roblox
It's more annoying than people make it out to be. I spent a weekend on this when some kids at school were making fan games and asking for help. The core loop is simple enough, but the details eat you alive if you don't plan properly. At its heart, a FNAF Roblox game is a first-person security camera simulation with AI-powered antagonists, door/light mechanics, and a power management system. The original Five Nights at Freddy's ran on an engine called Ren'Py, which is basically just visual novel software. Roblox uses Luau (a version of Lua) and Roblox Studio, which is a completely different paradigm. The closest thing to FNAF's style is building in first-person with custom cameras, animated models, and scripted AI behavior trees. The trick isn't making it scary. It's making the systems work together without everything falling apart at 3 AM in-game. That's where most people fail.
Step One: Set Up Your Foundation
Open Roblox Studio and create a new Baseplate project. Delete the default SpawnLocation and Character that come with it, because you're going to want a custom first-person controller. Here's the thing nobody tells you: you can build the whole game with default ROBLOX tools and get a playable prototype in maybe four or five hours if you know what you're doing. For the camera system, you need to override the default Roblox camera. The standard FreeCamera or ScriptableCamera works fine for this. Put a script in ServerScriptService that locks the player's view angle and movement while they're at their desk station. When they switch to the camera monitor, you trigger a separate camera mode that lets them pan around the building. Here's the first common mistake I see: people try to make the animatronics pathfinding the moment the game loads. Don't do that. Pathfinding in Roblox is expensive. Each active Agent that's running NavMesh calculations eats memory, and once you have more than three or four moving enemies at once, your frame rate tanks on lower-end machines. Start with simple waypoint-based movement and only upgrade to full pathfinding if you actually need it.
Building the AI System
The original FNAF enemies had what people call "AI levels" — a number from one through ten that determined how aggressively they moved toward the player's office. In Roblox, you replicate this with a combination of randomized timers and proximity checks. The animatronic waits a random interval, then moves to the next waypoint if the player hasn't closed the door or shined a light in its face. I built a script using a dictionary to track each animatronic's current location, aggression level, and last movement timestamp. Every few seconds, a server-side loop checks whether to advance each enemy toward the player's position. The key detail is that you put these checks on the server, not the client. If you run the AI logic client-side, people can manipulate the values through the output console or a modifier trainer and trivially break your game. Here's something that tripped me up when I was first doing this: the door mechanic. A lot of people make doors that instantly close and play a sound effect, but this creates a problem called input lag perception. The door takes maybe 0.2 seconds to physically close in the animation, and during that window the animatronic can still attack if its hit detection is set too generously. I solved this by making the hitbox validation server-side with a small grace period, so the animatronic only attacks after the door is fully shut. This cut down on false-attempts by roughly seventy percent.
Get the Full Details
The Power System
Power management is the game's tension engine. Without it, there's no reason for the player to make choices. You want to model it as a decreasing resource that powers doors, lights, and cameras simultaneously. Each active system drains power at a different rate. Doors drain the fastest. Cameras drain moderately. Lights drain slowly but frequently since players spam them. Start with a base capacity of one hundred units. Doors cost about eight per hour of gameplay. Cameras cost about three per hour. Lights cost about two per hour. These numbers aren't perfect but they give you a starting point that you can tune from there. The original FNAF games had power that lasted about sixty to ninety minutes of real-time depending on playstyle, and your Roblox version should aim for something in that same ballpark. One counter-intuitive thing about the power system: making it too generous ruins the experience. Players need to feel the pressure of choosing between watching the cameras and keeping the doors sealed. If they can do both comfortably, there's no strategy involved. I learned this the hard way on my first build, where the power lasted nearly two full in-game nights. Nobody got scared because nobody had to make a hard choice.
Camera and Environment Design
The camera system needs to feel like a security feed. Add a slight vignette, lower the brightness, and use a static overlay texture to make it look degraded. This is mostly aesthetic but it matters because visual clarity changes how players perceive threat. When cameras are too clear, animatronics feel less menacing. When they're grainy and dim, players lean in closer and pay more attention. Build your building layout with separate rooms connected by hallways. Each room should have a camera node that the player can switch to. The hallway system is where you place your animatronic waypoints. Keep the geometry simple — thick walls, no cut-throughs. Roblox's default lighting and shadows work fine for this, but you might want to enable SSAO (Screen Space Ambient Occlusion) in your Project Settings for a bit more atmosphere. It costs about five to ten percent more GPU load, which is usually acceptable.
Animation and Assets
You don't need to model everything from scratch. The Roblox toolbox has a lot of free assets, and you can find some decent animatronic-style characters if you search for "robot" or "animatronic." The problem is that pre-made assets often have bad rigging, which means their animations glitch out when you move them around. Always test any imported character in your actual game environment before you commit to using it. If you're going to model your own characters, keep the polygon count reasonable. We're talking under ten thousand triangles per animatronic if you want this to run smoothly on lower-end devices. Roblox's limit is actually higher, but your target audience includes a wide range of computers and phones, so optimization matters more than you might think.
Testing and Balancing
Build a debugging tool that shows you each animatronic's current position, AI level, and movement timer in real time. Put it in a screen GUI that only appears when you enable a test mode flag. This saves you from having to play through the entire game every time you want to check whether an enemy is behaving correctly. I spent three hours once trying to debug why an animatronic was stuck because I hadn't realized I'd accidentally set its path to a waypoint that didn't exist. The debugging HUD would have caught that in thirty seconds. Playtest with people who haven't seen the game a dozen times. Your internal feedback loop as the builder is unreliable because you already know how everything works. Someone who's playing cold will react differently to scares, power shortages, and camera switching. Note what they complain about and adjust accordingly. Here's the blunt truth about what usually goes wrong: the game is either too easy or too hard, rarely both at once, but consistently one or the other. If players finish a night without ever feeling stressed, your animatronic aggression is too low. If they lose before thirty minutes in every single time, the AI is too aggressive or your power curve is too steep. Find the middle ground through iterative testing, not by guessing.
