FNF Indie Cross Game: FNF Mod That Turns Rhythm Battles Into Boss Fights

FNF Indie Cross is a rhythm mod for Friday Night Funkin’ that throws Boyfriend into crossover battles with characters from Cuphead, Undertale, and Bendy and the Ink Machine. It stands out because it is not just a song pack—each week adds mechanics, cutscenes, route changes, and boss-style pressure that make the mod feel much bigger than a standard FNF release.

What FNF Indie Cross Is

Indie Cross was created by MORØ and is currently directed by Penkaru, with Brightfyre and DAGames listed as former directors. The mod’s streamer build released on November 2, 2021, followed by version 1 on April 8, 2022, and version 1.5 on April 30, 2022.

The setup is simple at first glance: Boyfriend gets pulled through strange portals and dropped into different indie game worlds. But the mod does more than borrow familiar faces. It rebuilds the mood of each source game, from Cuphead’s cartoon chaos to Undertale’s bullet-hell tension and Bendy’s dark studio horror. That variety is a big reason the mod still gets talked about years later.

The Story Setup

The opening cutscene starts in a void of darkness where Boyfriend spots a distorted, nightmare-like version of Girlfriend. A red glow takes over, cracks split through the space around him, and he is launched through a series of worlds by violent portals. Eventually, he ends up staring at a mysterious light at the center of countless swirling red portals, which gives the whole mod a more ominous tone than the usual FNF setup.

That opening matters because it frames Indie Cross as more than a set of disconnected guest battles. There is a force pushing Boyfriend from world to world, and even when the mod focuses on music, it keeps that uneasy feeling in the background.

Week 1: Cuphead

Boyfriend’s first stop is the Inkwell Isles, where Cuphead mistakes him for the cause of a strange disturbance and challenges him. That starts a three-song set built around “Snake Eyes,” “Technicolor Tussle,” and “Knockout,” with visuals modeled after Cuphead’s style and environments. Mugman also becomes part of the scene, and the story escalates from a misunderstanding into a much more serious fight before Boyfriend is pulled away again by a portal.

This week is where Indie Cross makes its point right away: the mod wants each opponent to feel like they brought their own rules with them. Cuphead uses a Super Meter system, Peashooter attacks that drain health, Chaser shots, Parry Notes that instantly fill the meter, and EX moves that force timed dodges. It feels less like a normal rap battle and more like surviving a boss phase while still hitting your notes.

Week 2: Sans

The second week sends Boyfriend into Undertale’s Underground, where Sans is waiting in the Last Corridor. Sans says he was hired by someone unknown to destroy Boyfriend, though he still starts with what looks like a friendly battle. That friendly mood does not last.

The music here includes “Whoopee” and “Sansational,” but the final song changes depending on how the player behaves. If Boyfriend does not attack Sans too much during “Sansational,” the week follows the Pacifist route and ends with “Final Stretch.” If he attacks Sans at least three times, the week switches to the Genocide route and ends with “Burning in Hell.” Finishing those routes unlocks extra songs like “Bonedoggle” and “Bad to the Bone,” and clearing both is required to unlock “Bad Time.” That branching structure is one of the smartest parts of the mod because it turns player behavior into part of the story.

Sans’ mechanics lean hard into Undertale references. Blue bone notes are dangerous, route choices matter, and some sections shift into a battle UI where Boyfriend has to move his SOUL around to dodge Gaster Blaster attacks. It is one of the weeks where Indie Cross stops feeling like a tribute and starts feeling like a remix of the original game’s design.

Week 3: Bendy

The final main week drops Boyfriend into Joey Drew Studios, where he first bumps into a cardboard Bendy cutout, then ends up facing the Ink Demon himself. Sammy Lawrence appears during the chaos, and depending on the selected difficulty, Boyfriend either narrowly survives or gets dragged through a much harsher chase before the portal intervenes again.

The Bendy set includes “Imminent Demise,” “Terrible Sin,” “Last Reel,” and “Nightmare Run.” The feel of this week is different from the other two. Cuphead is flashy and aggressive. Sans is technical and reactive. Bendy is oppressive. The screen dims and brightens, health constantly gets pushed back, and Ink Notes can cover the screen until visibility becomes a problem on its own. Mess up too many times and the punishment is brutal.

There is also a nice bit of attention to atmosphere here. Bendy-related presentation changes include title cards and a Game Over sequence tied closely to Bendy and the Ink Machine’s style, which helps the week feel distinct instead of just darker by default.

Bonus Songs and Freeplay Content

Outside the three main weeks, Indie Cross adds a substantial freeplay lineup. The extra songs give the mod room to spotlight characters and ideas that do not fit neatly into the main story path.

Freeplay is not a safe zone, either. The mod keeps its custom mechanics there, including fire notes, health drain, enemy rushes in Devil tracks, note-shifting in “Bad to the Bone,” axe attacks in “Ritual,” and nightmare songs where mechanics cannot be disabled. That decision can be punishing, but it also keeps the whole package consistent. Indie Cross wants players to engage with its systems, not just admire the crossover idea.

Songs list:

Snake Eyes – Technicolor Tussle – Knockout – Whoopee – Sansational – Final Stretch – Burning in Hell – Imminent Demise – Terrible Sin – Last Reel – Nightmare Run – Satanic Funkin – Bonedoggle – Bad to the Bone – Ritual – Freaky Machine – Devils Gambit – Bad Time – Despair

Prologue:

In a shadowy, empty space, a crimson portal flares to life, releasing Boyfriend into an eerie dimension. He spots Nightmare Girlfriend—her form twisted and glowing—before she erupts into a blinding red beam. The explosion leaves behind a jagged, radiant crack that shatters again, morphing into a blazing star.

Credits

• Director(s): Penkaru, Zeroh, kaydotnet (Formerly), DAGames (Formerly)
• Creator(s): MORØ
• Charter(s): Kal, AlcoholicDJ, Cerbera, Cval, Clover, DatDavi, Faiding
• Composer(s): Saster, Saruky, Tenzalt, TheInnuend0, Orenji Music, YingYang48, Rozebud, Joan Atlas, Mike Geno,  CDMusic, DAGames, CrystalSlime, BLVKAROT, BBPanzu, Brandxns, Yamahearted, verti, LuvSealsss, Sp0re,  headdzo, KamexVGM, kiwiquest, Penkaru, Midatii, SimplyCrispy, TheRoyalTony
• Sound Effects: SicOn_, pohsan
• Artist(s): MORØ, Iku Aldena, JzBoy, Crae, Diavololi, SugarRatio, Cally3D, Riveren,  Nebits, Aurum, crim, Bean Gamer, DanielaVE, Fore, I𝘀𝗲𝘁𝗮, TiredPinkPanda,  EllisBros, Gorbini, Kixel, KaijuRhino, Marco Antonio, Mink,  NOKI, Nata, NetBa,  OJogadorAnimador, River_, Sakaruchibi, SoutDakobla, volv, verty
• Animator(s): MORØ, JzBoy, Crae, Iku Aldena (art), Aurum, Kixel, Gorbini
• Voices: DAGames (Cuphead & Mugman), James Dijit (Sammy Lawrence), SrPelo (Saness), UzumaChi-Chi (Hornet), Penkaru (Theodore Masters Peterson), Aztrolotl (Huggy Wuggy)
• Programmer(s): kaydotnet, Sector03, ShadowFi, Gedehari, SrPerez, Polyproxy, Smokey_5, Sokudo/Hexar,  Ash, KadeDev, TaeYai, Isophoro, Data5, volv, wizard, Clowfoe (Formerly)
• Misc: Zeroh (Funkkast Trailer), elikapika (CD art), fishy (Silk Hornet art), speedz (One shot animation)
• Special thanks: Penkaru, UniqueGeese, StickyBM, Woops, Rayzord, 8owser16, Core, VaporTheGamer, 8-BitRyan, Dawko, niffirg, Mikeeey, Jellyfish, HugeNate
• Online Web port by KBHGames.com to make it easier to play online. Updated port to original engine, menu, mechanic, everything else (3/15/2026).

As always, remember to have fun!