Playing FNaF 4 With Other People
I set up an online multiplayer session for FNaF 4 about two years ago and quickly learned that it is not a clean experience. The game was never designed for networking, so everything you do to make it work is a compromise. I have played on roughly a dozen different servers across different launchers and I will walk through what actually happens when you try to run it. FNaF 4 Online refers to modified versions of the original game that add networking support, usually through custom matchmaking clients or peer-to-peer hosting. The base game by Scott Cawthon has no multiplayer code built in. The people who make these online versions take the Steam release, hook it into a networking layer, and then synchronize game states between connected clients. Some implementations use dedicated servers hosted by third parties. Most of them use direct peer-to-peer connections where one player acts as the host. The most commonly referenced client I have used is called FNaF 4 Online, which you can find on the project's GitHub page. The download page is straightforward. You grab the zip, extract it, and run the executable. There is no launcher bloat or account creation for most versions. You pick a server from a list and you are in a lobby within thirty seconds on a decent connection.
Here is the part nobody mentions upfront. The synchronization is not perfect. Audio cues like the breathing sounds and distant music change slightly between clients. The lighting on the hallway cameras can be offset by a frame or two depending on your hardware. This matters because FNaF 4 is entirely audio-driven. If you are relying on Bonnie's footsteps to judge his position and your client's audio is even slightly desynced, you will misread the call and die. I lost three nights in a row to this exact issue before I figured out I should play with my eyes mostly closed and rely purely on the audio.
How the Networking Layer Works
Most of these projects use a custom networking library built on top of libtcod or similar open source frameworks. The host runs the actual game simulation. The clients receive state updates and render their own versions. This is a common approach for retro-style horror games because it keeps bandwidth low. You are not sending video. You are sending position data, animation flags, and event triggers. The host has authority over the AI behavior trees. When Freddy appears, the host decides exactly when he opens his mouth and when he charges. Client machines just receive a flag that says the event is happening. This means if you are a non-host player, you are trusting the host's machine performance. A laggy host will make the game feel stuttery for everyone else. I once joined a server where the host was running on an old laptop and the jumpscare animations were delayed by nearly half a second. It completely ruined the timing. There is also a chat system in most implementations. It is usually a simple text box that broadcasts to all connected players. Some servers enable voice chat through integrated solutions, but the default versions do not. I recommend using Discord alongside the game rather than relying on in-game voice. In-game voice tends to compress audio heavily and can interfere with the sound cues you need to survive.
Get the Full Details
Connecting to a Server
The process varies slightly between versions. For the most common setup, you download the client from the official repository, launch it, and you are presented with a server browser. The server list pulls from a central matchmaking server. You can filter by ping, player count, and whether the server is currently running a game. Sorting by ping is the most important filter. If your ping to a server is above one hundred and fifty milliseconds, the desync becomes noticeable and the audio timing will frustrate you quickly. Once you pick a server, you join the lobby. Lobbies can hold between four and eight players depending on the configuration. Some servers run in competition mode where one player is the monster and the others are survivors. Others run cooperative mode where everyone plays as the child character simultaneously. The competition mode is more common and tends to be more stable because the monster player does not need synchronized camera footage. I hit a specific edge case on a server that changed the night length based on total player count. The server operator had modified the configuration so that each additional player reduced the time between events. On a six-player server, the nights felt almost twice as fast as solo. I kept dying because the timing was completely different from what I was used to. The workaround was simple. I stopped trying to memorize event timings and started paying closer attention to the ambient audio shifts. The game gives you warning sounds before major events. Relying on those instead of internal counting cut my deaths down significantly.
Common Problems and Workarounds
Disconnects are the biggest issue. Since most of these implementations use peer-to-peer hosting, if the host disconnects, the game ends for everyone. There is no automatic failover. I have lost progress multiple times because a host's internet dropped mid-night. The workaround is to check the server status before committing to a long session. Look for servers with consistent player counts and hosts who do not seem to be on unstable connections. Some communities maintain Discord servers with lists of reliable hosts. Joining one of those helps avoid random disconnects. Another problem is configuration conflicts. FNaF 4 Online modifies the original game files. If you have custom textures or mods installed in your base game folder, they can interfere with the networking build. I encountered a situation where a custom Freddy texture I had installed caused the jumpscare animation to break in multiplayer. The model loaded incorrectly and the face would clip through the wall. The fix was to copy the original game files into the online version's directory and overwrite any modified assets. This is tedious but it restores stability. Anti-cheat is not really a thing in these communities. Some servers implement basic checks for impossible events like passing through walls or skipping entire nights, but most do not. This means you will occasionally run into players using modified game files to gain advantages. In competition mode, this can mean a Freddy player who spawns closer to survivors or has longer charge durations. There is no real enforcement. If it happens on your server, report it to the host and move on. Hosts usually ban repeat offenders manually.
Performance Expectations
The networking adds minimal overhead to your system. The original game runs on almost anything. Adding a network client might increase CPU usage by ten to fifteen percent depending on your machine. I have run FNaF 4 Online on a machine with four gigabytes of RAM and it was playable, though I had to close other applications to maintain stable framerates. If you are experiencing stuttering, it is almost always due to background processes rather than the networking itself. Audio latency is the more relevant concern. If your system has audio sync issues or is using a virtual audio cable, the timing between visual and audio cues can drift. I tested this by playing the same night on three different machines and noticed that two of them had slightly different audio onset times. The difference was measurable but small. It only becomes a problem when you are running other audio processing software simultaneously. Close everything except the game and your audio drivers before playing.
Where to Find and Download
The primary source is the official GitHub repository for the project. The link changes occasionally as development moves forward, so a quick search for the current version is necessary. The README file in the repository contains installation instructions and troubleshooting steps. There is also a community Discord server where updates are announced and support is available. I have found the Discord to be more useful than the GitHub issues section for getting answers to specific problems. Be careful about unofficial mirrors. Some websites redistribute the client with added bundlers or altered files. I downloaded a copy from a random gaming forum once and the executable contained adware. Always verify the source and check the commit history on GitHub to make sure the files you are downloading match what the developers published. The file sizes should be consistent. Significant deviations usually indicate tampering. The game is free. There are no paid versions or subscriptions required to play. Some servers may offer cosmetic customizations for a donation, but the core multiplayer functionality is open. If a site is asking you to pay for access, it is not the official version. The developers have been clear about keeping it free and open source.
What This Experience Does Not Fix
FNaF 4 Online is not going to give you a polished multiplayer experience. The desync, the lack of robust hosting, and the configuration headaches are real limitations. If you are looking for a smooth co-op horror experience, there are better options like Phasmophobia or Dead by Daylight. This is specifically for people who want to play FNaF 4 with others and are willing to deal with the technical rough edges. The fun is there. The execution is not clean. I still play it because the original game is one of the best in the franchise and playing it alone after a while gets repetitive. Sharing the tension with other people changes the dynamic in a way that feels different from solo. The audio misreads and sudden deaths become inside jokes. The server regulars develop their own routines and shorthand. It is a niche experience but for the right group of people it works well enough to justify the effort of setting it up correctly.
