FNF X UnderWrap

A Fresh Take on a Beloved Crossover

FNFX UnderWrap brings a fun and unique twist to the world ofFive Nights at Freddy’sandUndertale. In this creative mod, the roles ofSansand Papyrus are completely flipped — with Sans taking on the role of the energetic, upbeat human hunter, and Papyrus playing the more laid-back character. This fullFriday Night Funkin’experience is powered by the smoothPsych Engine, making it ideal for players with low-spec devices.

Whether you're a long-time fan of FNF or a newcomer looking to dive into some fresh mod content, this Undertale-inspired crossover delivers a vibrant mix of music, rhythm, and reimagined characters. The mod is also available as aweb-optimized version, so you can enjoy it right in your browser — perfect for Chromebooks, Macs, and Linux systems.

Tracklist: Rhythm Meets the Underground

The mod features a set of catchy, original songs that bring theUnderWrapuniverse to life:

• eh-eh-eh
• royal
• magnificent
• shiftless
• lazybones

Each track captures the unique energy of the role-swapped characters, giving players a fresh musical journey through the underground.

What Makes This Mod Special?

This isn't just a simple reskin. FNF X UnderWrap flips the script on familiarUndertalecharacters, offering a new dynamic in both story and gameplay. The use ofPsych Engineensures smoother performance and better optimization, especially for those who want to enjoy the mod on less powerful hardware. It's a great way to experience a new side of both FNF and Undertale.

Meet the Team Behind the Mod

A huge thanks goes out to the incredibly talented team that made this mod possible. Here's a breakdown of the contributors:

Mod Creators & Contributors

• NightVibezz– Mod Owner, Charter
• CODINStampS– YouTube:Channel Link
• WassabiSoja– YouTube:Channel Link
• Yazza– Musician | YouTube:Channel Link
• Lester– YouTube:Channel Link
• Rareblin– YouTube:Channel Link
• HLoSans– Assets and Sprites | DeviantArt:HLoSans
• Amaze– Demo Sprites and Animations | Twitter:@AmazeinG666

Charters

• NightVibezz– YouTube:Channel Link
• Troupe Master Sebi– YouTube:Channel Link
• Hawk– YouTube:Channel Link

Editors

• themistake– YouTube:Channel Link
• Itrytodopsychportsandfail– Part of the Psych Engine Port

Powered by Psych Engine

This mod is built on the popularPsych Engine, which enhances performance and allows for a more stable and optimized experience. Credits for the engine go to:

• ShadowMario– Main Programmer
• bbpanzu– Additional Programmer
• RiverOaken– Main Artist/Animator
• And all the amazing contributors on GitHub

Original FNF Credits

We also want to recognize the originalFriday Night Funkin’team for laying the foundation for such incredible community creativity:

• ninja_muffin99– Programming
• PhantomArcade3kandevilsk8r– Artists
• kawaisprite– Composer
• And all the open-source contributors on GitHub

Play Anywhere, Anytime

Thisweb-optimized versionof FNF X UnderWrap aims to make the mod more accessible to a wider range of players. Whether you're rocking a budget PC, using a Chromebook, or running macOS or Linux, this version gives you a chance to enjoy the mod without needing to run heavy .exe files. Just keep in mind that some features or mechanics may differ slightly from the original PC build. For the full experience, downloading the official version is always recommended.