FNF: Sonic Vs. Fleetway Chaos Nightmare

FaceSonic’s Inner Demons in This Challenging Rhythm Mod

InFNF: Sonic Vs. Fleetway Chaos Nightmare, players dive into a haunting nightmare where Sonic confronts his darkest fears. Based on the eerie and surreal Fleetway interpretations of Sonic characters, this mod brings psychological horror to life through rhythm gameplay.

The centerpiece of this mod is the intense original song titled“phantasm”, a high-energy track that tests even seasoned Friday Night Funkin’ veterans. With its fast-paced lyrics and complex note patterns, this one-song experience delivers a true test of skill and timing.

Built using thePsych Engine, the mod is fully web-optimized, making it easy to play directly in your browser—no downloads or powerful PCs required.

Gameplay & Story: A Nightmare Fueled by Chaos

This mod reimagines classic Sonic characters in a nightmarish setting, where Sonic must face off against twisted versions of himself and his friends. The visual style takes heavy inspiration from theFleetwayuniverse—a darker, more psychological take on the iconic franchise.

As you progress through the song, the atmosphere becomes increasingly tense, with visuals and animations that reflect the chaotic energy of the battle. It's a short but memorable experience that leaves a lasting impression.

Web Optimized for Easy Access

One of the standout features of this mod is itsweb-friendly build. Designed to be played in any modern browser, it removes the need for local installation or high-end hardware. Whether you're on a school Chromebook, a Mac, Linux, or an older PC, you can enjoy the mod without hassle.

Mod Credits

This mod was brought to life by a talented group of creators from across the FNF community:

Main Creators

• GARBO: Direction, Sprites, Animationhttps://twitter.com/EvrythingGarbo
• Biddle3: Musichttps://twitter.com/Biddy312
• Ito: Background Arthttps://twitter.com/ItoSaihara_
• JayyThunder: Sprite Arthttps://twitter.com/ThunderJayy
• LuckyPuppet: Chartinghttps://twitter.com/LuckyThePuppet
• Murasaki: Codinghttps://twitter.com/Murasaki_1514

Powered by the Psych Engine

The mod runs on the popularPsych Engine, which enhances performance and allows for better optimization. The engine was developed with contributions from:

• ShadowMario: Main Programmer
• bbpanzu: Additional Programming
• RiverOaken: Main Artist/Animator
• And many other contributors via GitHub

Original FNF Team

We also want to give credit to the original developers ofFriday Night Funkin':

• ninja_muffin99: Programming
• PhantomArcade3kandevilsk8r: Artists
• kawaisprite: Composer
• As well as all the open-source contributors on GitHub

If you enjoyed this mod, consider supporting the creators on their social platforms. Even though it's free, recognition helps fuel future projects in the ever-growing FNF modding scene.