FNF: Potassium (Attack Of The Killer Queen Sings Endless)

Rating:4.5 (180 votes)
Released:December 29, 2025
Technology:HTML5 (Unity WebGL)
Platforms:Browser (desktop, mobile, tablet)

Get Ready to Drop the Beat inFNF: Potassium

InFriday Night Funkin’: Potassium,Boyfriendfaces off against a high-energy mashup of two iconic tracks: “Endless” fromSonic.EXEand “Attack Of The Killer Queen” fromDeltarune. This rhythm game mod brings intense charting, unique visuals, and a killer musical combo that’s sure to test your skills—all optimized for smooth browser play.

Whether you're a long-time FNF fan or a rhythm game enthusiast looking for a fresh challenge,Potassiumdelivers a unique crossover experience that blends the eerie vibes ofSonic.EXEwith the dramatic flair ofDeltarune.

What Makes Potassium Special?

This mod isn't just another FNF port—it's a full-on visual and audio experience. With custom sprites, dynamic stage elements, and expertly charted beats,Potassiumtakes the best of both worlds and fuses them into one electrifying performance. The mod also features rotating banana pillars and a sleek, thematic UI that keeps you immersed in the action.

The mod is built using Kade Engine, offering enhanced performance and smoother gameplay—especially for those who want to enjoy it directly in the browser without downloading or installing anything.

Game Optimization for Everyone

One of the main goals ofFNF: Potassiumis accessibility. Whether you're on a low-end PC, a Chromebook, a Mac, or a Linux system, this mod is designed to work smoothly in your browser. No need to worry about .exe files or compatibility issues—just open the game and start jamming!

Mod Creators & Contributors

This mod was made possible thanks to a team of passionate creators. Here's a shoutout to the talented individuals behind the scenes:

Main Mod Team

Original Sonic.EXE Mod Credits

  • Rightburst: Director
  • Razencro: Main programming
  • MarStarBro: Main composer
  • Comgaming_Nz: Background art for 'Too-Slow' and 'Endless'
  • Zekuta: Animation and secret song background
  • Crybit: Programming, Story Mode menu completion

Original FNF Credits

  • ninja_muffin99: Programming
  • PhantomArcade3kandevilsk8r: Artists
  • kawaisprite: Music composition
  • Kade Dev: Kade Engine
  • And to all the contributors on GitHub who made the base game possible

Play It Anywhere

Thanks to its web-optimized build,FNF: Potassiumremoves the barrier to entry. You can now enjoy this incredible mod on any device with a modern browser—no downloads, no installations, just pure musical madness at your fingertips.

So, are you ready to take on theAttack Of The Killer Queenand survive theEndlessbeat? Show off your skills and see how far you can go in this adrenaline-pumping FNF crossover!