Mechanics

This page seeks to organize and document the unique game mechanics implemented into different Friday Night Funkin' mods, along with a list of mods which utilize them.

Mechanics with similar functionality should be grouped together and given a generic name. For example, notes which damage the player when hit should not be referred to as Fire Notes, since other mods may also use the mechanic.

Custom Note Types
A variety of mods add custom notes to the game. These may have custom behavior when hit, or a custom behavior when missed.

Hazard Notes
Hazard Notes are notes which must be avoided, and hitting them will cause the player to lose HP. These are a test of the player's reaction as well as a counter to spamming the note keys.

The following mods use this mechanic:


 * Vs. Tricky: During the third song, Hellclown, Fire Notes will appear, which cause the player to lose about 20% of their HP when hit.
 * Times & Tribulations (Vs. Omega): Sword notes deal damage to your HP when hit. They are present in Prelude, Guardian, Last Stand, Curse Eternal, and 2v200.
 * Fliqpy (j0nnytest): Pressing on a grenade at the very end of Hiding will make it explode and harm your HP, obviously.
 * Scrapeface's black notes function similarly to Tricky's fire notes.
 * Violastro's Star notes will play a "BONK!" sound and cause Boyfriend to lose 7.5% HP.
 * Sunday Night Suicide: Skull Notes that cause the player to lose HP when hit. These notes appear during Really Happy, and at the end of Happy in a pattern that spells out "REAL SUFFERING".
 * Windows XP: They, like everyone else, do a lot of damage. They appear for the first time in the song "Sparta", provided that the complexity is at least normal.
 * Vs. Sonic.Exe: During You Can't Run and Triple Trouble, transparent notes will appear. Hitting these causes you to take damage, and continuing to hit them will deal more damage.
 * Bambi's Purgatory: During Supplanted and a later portion of Screwed, corn notes will appear, and hitting these will damage the player.

Instakill Notes
Instakill Notes are similar to Hazard notes, but they instead cause the player to lose 100% of their HP (thus immediately triggering a Game Over) regardless of the player's current HP.

The following mods use this mechanic:


 * Vs. Tricky: During the bonus song, Expurgation, Dark Halo Notes will appear, which cause the player to instantly lose if they hit them.
 * Playing With Your Life: During Suffer in Blood, VERY rare "spikes" can be found in the chart, which instakill they player when hit.
 * Doki Doki Takeover: During Your Demise, Obsession, and Epiphany, Notes of Markov will appear. Hitting this will instantly kill the player.
 * Shaggy x Matt: During the bonus song, Shaggy uses fire notes which instantly kill the player if hit.
 * Times & Tribulations (Vs. Omega) The many glitch notes in Father time instantly kill you when you hit even 1 of them.
 * Windows XP: They, like everyone else, instantly kills the player. They first appear in the song "Error", provided that the complexity is on the hard one.

Warning Notes


These notes do not have any downsides upon hitting them, but failing to hit them causes the player to lose significantly more health than a normal.

The following mods use this mechanic:


 * Friday Night Funkin' HD: During the Week 3 song Blammed, warning notes will appear as Pico is about to shoot at the player. The player must hit these notes to dodge them, or they will lose 50% of their HP.
 * Vs. Bob: During Onslaught, failing to hit a Lavender note will play a sound effect and rapidly drain the player's health. This will cause the player to lose 75% of their HP over 3 seconds.
 * Playing With Your Life: During Insanity, Life or Death and Suffer in Blood, failing to hit a Warning will cause the player's health to drain for a varying amount of time.
 * Shaggy x Matt: During the bonus song, Matt uses fire notes which deal massive damage if missed.
 * Mag Agent: Torture will shoot you with a shotgun. Press the red caution sign coming to your strikeline or get shot.
 * Friday Night Bloxxin': In Noob, the Noob tries to slash you to death and shoot you with the rocket launcher to make the song more challenging. Hit the caution signs in order to dodge.
 * Vs. Sonic.Exe: The static notes do damage and glitch out the screen for a fraction of a second when missed.
 * Windows XP: They first appear in the song "Sparta" provided the difficulty is normal or higher. If you press then you will get the same points if you would press regular notes and are counted in Combo. If you do not press it, it instantly kills you.

Poison Notes
These are similar to Hazard notes, but they instead cause the player to slowly lose HP over time. This can last for a set duration or the entire duration of the song. The HP drain can be prevented by not hitting the note.

The following mods use this mechanic:


 * Vs. /v/-tan: During the bonus song featuring Cancer Lord, hitting a yellow Ebola note will display a graphic and cause the player to lose HP over time. The more Ebola notes that are hit, the more HP will be drained.
 * Vs. Bob: During Onslaught, hitting an Inverted note will play a sound effect and rapidly drain the player's health. This will deal 150% damage over 3 seconds.


 * Times & Tribulations (Vs. Omega): In Week 2, Torch notes hastily drain the player's health when hit.


 * Playing With Your Life: In Insanity, Life or Death and Suffer in Blood, hitting Mines will cause the player's health to quickly drain for a varying amount of time.


 * Vs. RetroSpecter: In spectral and ectospasm shiny green notes containing poison will appear throughout the songs.The more notes the player hits, the faster their health will drain. However, the poison's effects will not kill the player directly.

HP Drain


Some mods include a mechanic which drains your HP at certain times. Unlike other custom mechanics (like Hazard Notes or Spacebar Spam), this drain can't be avoided, and can only be mitigated by hitting notes (thus recovering your HP).

Some mods which use this mechanic only drain your health while it is above a certain threshold.

The following mods use this mechanic:


 * Vs. Tricky: During the bonus song, Expurgation, Tricky will occasionally summon a HP Gremlin, which will pull the player's health bar, draining them for some of their HP. The amount of HP drained by the Gremlin increases as the song progresses.
 * While the HP Gremlin is draining the player's HP, hitting notes will not recover HP.
 * Playing With Your Life: During Life or Death, the player's health will slowly drain. During Suffer in Blood, the player's health will drain at a quick rate when Corrupt sings. During Counter Attack, the player's health drains incredibly quickly.
 * Vs. Tabi: During the song Genocide, the player will constantly lose 1% HP per second. Additionally, they will lose 1% HP whenever Tabi hits a note.
 * Vs. Bob: During Run, Bob will occasionally obscure the entire screen. When this happens, aside from causing an obstruction, the player will lose about 15% HP.
 * Vs. Cheeky: During Hard 2 Break, Cheeky will randomly shoot his gun at Boyfriend, causing the player to lose HP.
 * The frequency with which this happens is completely random.
 * Friday Night Funkin': Soft: During the ??? chapter, Boyfriend will drain Soft Boyfriend's health whenever it's the former's turn. Unlike most instances of this mechanic, this can't kill the player.
 * Martian Mixtape: During the songs Confidential, Hey, and Shades (vs the FBI agent), the agent will become panicked. While the agent is panicked, the player will lose HP whenever the agent hits a note.
 * The agent will no longer panic when the player drops to 50% HP, and the player will no longer lose HP from the agent.
 * The effect will resume if the player goes back over 50% HP.
 * Noke: Gem notes (when hit by Noke) drain BF's health slightly.
 * Grey gem notes instantly set BF's health to 1 when hit by Noke.


 * Times & Tribulations (Vs. Omega):
 * Omega pushes back the health bar when he sings in Last Stand
 * The King drains BF's HP in Dishonor when the screen is greyscale and he hits a note.
 * Daddy Dearest drains HP in Father Time when he sings.
 * In 57.5Hz, Demetrios will reduce your HP to 1 when he hits an electric discharge note.
 * Noke cameos in this mod too and he brings his (heavily bloodstained) gem notes with him. The default gem notes function the same as in Noke's original mod. However, the grey gem notes can now appear on your side as well. Hitting one will reduce your HP to 1 but missing it instantly kills you, making them practically a mandatory reduction to 1%.
 * Weegee also decreases your HP when singing in Invasion. In Obsolete, your HP drops to near death when he commands you to die.
 * Friday Night Bloxxin': Noob and Guest deal a small amount of damage to your health like it's Funky Friday.
 * Slenderman slowly eats away at your health when singing. This turns into complete obliteration when Slenderman sings a long note, however.
 * Scrapeface: When the red static flashes, Boyfriend loses some health. Scrapeface also slowly drains the health bar when singing in some parts of Mistake.
 * Vs. Sonic.Exe: This mechanic appears during two songs:
 * During You Can't Run, Sonic.exe will drain your health slowly while he sings.
 * During Black Sun, your health will drain during the entire song. Hitting notes will slow down the health drain and potentially stop it, while missing notes causes it to significantly increase. Hitting notes does not effect health anymore.
 * Bambi's Purgatory: During Disposition, this mechanic appears and is constant throughout the whole song.
 * Vs. Dave and Bambi: Health drain is present during Cheating and is very severe, applying very tight miss goals to the song.
 * This also appears during Unfairness, but is more negligible.

Increased Maximum HP
Some mods include a mechanic which increases the player's maximum HP during certain songs. This can be used to give the player more leeway during difficult songs, or to allow the player to compensate for other mechanics such as HP Drain or Hazard Notes.

The following mods use this mechanic:


 * Vs. Tabi: During the song Genocide, the player's maximum HP becomes 150% of normal. This is indicated by the HP bar moving to the left as the player goes above the default HP level.
 * Trollge (The Blueballs Incident) During Pteromerhanophobia, the HP bar is far bigger than usual. However, there is a mini Trollge with an axe that cuts into the health bar. If your icon gets hit by the axe or if it is behind the axe, then you die.

Obstructions


Obstructions are graphics which block the screen, distracting the player or preventing them from seeing the notes they need to hit.

The following mods use this mechanic:


 * Vs. Tricky: During the bonus song, Expurgation, Tricky will summon between one and four stop signs, which move around, distracting the player and blocking their notes.
 * Castle Crashers Boss Rush REVIVED: Two songs use this mechanic:
 * During the song Bashing Drums (vs Barbarian Champion), missing a note will cause a crowd to appear and block part of the screen.
 * During the song Smudgy (vs The Painter), several Painter drawings will cover the screen at certain times.
 * Vs. Bob: Bob's week and Onslaught make use of several obstructions.
 * During Run, Bob will occasionally obscure the entire screen with his face. This also causes Health Drain.
 * During Onslaught, Bob will occasionally obscure part of Boyfriend's side of the screen with advertisements.
 * Vs. Cheeky: During Devil's Jello and Bedrock, Cheeky will occasionally obscure Boyfriend's side of the screen with an ad, similar to the Bob mod
 * Weegee: In Spaghetti and Runnin, if you miss a note wrapped in spaghetti, the spaghetti will cover your entire screen for a few seconds.
 * Tinky Winky (Slendytubbies):
 * You get jumpscared if you hit a static note
 * When you hit a dark purple note, the screen's edges will be covered with a black substance. The substance is not too obstructive itself but it disables ghost tapping, Press another dark purple note to get rid of this effect.
 * Slenderman: In Static, he will cause an intense amount of static with a close up of his face as a jumpscare. The note being white make this a possible distraction.
 * Vs. /v/-tan: During Sage, bait arrows will appear. If you miss one a 4chan thread will pop-up on the screen, obscuring it and the incoming arrows until the song is completed.

Note Flipping


This mechanic inverts the notes that Boyfriend must hit; to hit a left arrow, the player must press the key for the right arrow, hitting a down arrow requires pressing up, etc.

This mechanic can be mitigated by utilizing custom keybinds, and switching to a different set of input keys once the note flipping starts.

The following mods use this mechanic:


 * Vs. /v/-tan: During the bonus song featuring Cancer Lord, one of his minions will flip the player's strikeline, inverting the notes they must hit.
 * Vs. QT: During the song Termination, QT will use claws to swap around the notes of the strikeline. This causes right notes to move along the left side and vice versa.

Moving or Hidden Strikelines
Some mods will move, shake, vibrate, or hide the markers for the player to hit, which can distract the player and prevent them from hitting notes on time.

The following mods use this mechanic:


 * Castle Crashers Boss Rush REVIVED: During the fifth song, Subjugation, the Evil Wizard will move the strikelines around.
 * Vs. Cheeky: During Hard 2 Break, the strikelines will move in circles.
 * Vs. Bob: During Onslaught, the strikelines are manipulated in many ways.
 * He will rotate the notes in the strikeline to distract the player.
 * He will hide the strikeline so that the player must predict where the strikeline is located to hit the note
 * Vs. QT: During the song Termination, QT will use claws to move the strikeline. This forces the player to hit the note earlier or later depending on its position.
 * Times & Tribulations (Vs. Omega): In Last Stand, the strikeline is hidden. This combined with the massive amount of sword notes make the song extremely challenging.
 * Playing With Your Life: In Suffer in Blood and Mechanical Whirrs, the player's notes will move up and down.
 * Jebus (Madness Combat) (Astact): In Decide, Jebus moves the notes up and down
 * Vs. The Rascals: During the trust test in Wacky, the strikeline along with the notes are invisible. Gorbini sings the notes you need to press like GF does in Tutorial.
 * Vs. eteled: In Post-Mortal, the strikeline will randomly glitch, causing it to dissapear and a glarge group of notes to cover the area where the notes fall.
 * Vs. Sonic.Exe: During Too Slow, the strikeline will move around a bit.
 * Bambi's Purgatory: Several songs utilize this mechanic:
 * During Disposition, the strikelines will move towards eachother and return to their former position.
 * During Technology, the strikelines will gently wobble.
 * During Opposition, the notes are forced into a whirling mess that will slowly oscillate up and down.
 * Vs. Dave and Bambi: Two songs use moving notes:
 * During Cheating, the strikelines will move in a formation where 2 notes will travel nearly the entire distance to the other strikeline and return where the process alternates.
 * During Unfairness, the strikelines move in a circle.

Extra Note Keys


Some mods implement extra keys into the strikeline, which provide new notes in the note row that must be pressed on time. These rows may also include custom note types.

The following mods use this mechanic:


 * Vs. Shaggy: Eight songs use this mechanic:
 * During Kaio-ken, Blast and Super Saiyan, 6 notes are used (an up arrow, a down arrow, two left arrows, and two right arrows).
 * During Thunderstorm, Disassembler and Astral Calamity, 7 notes are used (an up arrow, a down arrow, two left arrows, two right arrows, and a diamond)
 * During God Eater and Talladega, 9 notes are used (two full sets of arrows and a diamond).
 * Shaggy x Matt: Three songs use this mechanic:
 * Revenge uses 6 notes.
 * Final Destination and Final Destination (God Mode) use 9 notes.


 * Times & Tribulations (Vs. Omega) has 2v200, where you use 6 notes to control both BF and Omega.
 * Velma: Surface and Velma's Spam Challenge both have 6 notes.
 * Friday Night Bloxxin': The Guest and Boyfriend play on 6 tile pianos during Guest and Silence, returning to the 4 note singing format in Evil.
 * V.S. Baphie: Three songs use this mechanic:
 * Happy Capri, Kanashi Yagi, and Headbutt all use 6 notes.
 * Shaggy x Velma: Four songs use this mechanic:
 * Containment uses 6 notes.
 * Inferno and Blizzard both use 7 notes.
 * Athanatos uses a whopping 13 notes.
 * Vs. Sonic.Exe: During Triple Trouble, an extra 5th note is added to the strikeline.

Spacebar Spam


Some mods may require you to spam an extra key (usually the spacebar) in order to avoid some negative consequence. Unlike with Extra Note Keys, this does not add notes to the strikeline, but instead uses other indicators for the player to press the key.

The following mods use this mechanic:


 * Castle Crashers Boss Rush REVIVED: Two songs use this mechanic:
 * In Frostbite, the Ice King will occasionally freeze the player. This will lock them from hitting notes, and the player will need to press the Spacebar until they are free.
 * In Reanimated, the Necromancer will occasionally fire Lightning at the player, forcing them to press Spacebar to dodge.
 * Vs. QT: During the song Termination, QT will spawn saw blades to attack the player, which require pressing Spacebar with precise timing to dodge.
 * Playing With Your Life: In Mechanical Whirrs, Corrupt will occasionally shoot at you, requiring you to dodge. Also, after the last verse of the same song, the player's health will drain at an insanely fast rate, and you can regain health by pressing K. This forces them to spam K to keep their health up.
 * VS. Clip: You press space 3 times quickly in order to dodge Clip's attacks and to attack Clip.
 * Friday Night Funkin' HD: In MILF, pressing space allows you dodge the street lights above the car you're standing on.
 * Friday Night Funkin' Lullaby: In Safety Lullaby, Left Unchecked, and Monochrome (Hell Mode), you will have to time your space bar hitting to a pendulum swinging, or else you will be hypnotized, causing an instant loss.
 * Vs. Sonic.Exe: This mechanic appears in two songs:
 * In Triple Trouble, you will have to press Spacebar to hit the ring notes.
 * In Chaos, you have to press Spacebar once to dodge Fleetway Super Sonic's laser. Failing to press Spacebar in time results in an instant loss.

Window Movement
In this mechanic, the game tab will move (and sometimes shake) as the name suggests.


 * Bambi's Purgatory: During Opposition, the window will move and shake while Expunged is singing. Theres also a chance that on some time, the window would go to the right going into a unviewable way, this takes on the way of not being able to see the game tab. forcing you to remember which note was used on each part.
 * Bob's Onslaught: This Mechanic takes place in 2 songs: These are run And Onslaught.


 * In Onslaught the window will move and form an infinity sign, and will get faster as the song processes.
 * In Bob's Impossible Song, Run Bob will cover the screen with his eye, during this. the game tab will shake and move itself.

UI & Camera Manipulation
Some mods may manipulate the UI or the camera, Which may confuse the player or make the song even harder. Unlike Rotating Arrows, There are different types of UI and Camera manipulations.

The following mods use this mechanic:

Vs. Trollface/Trollge: Most of the songs in week T swing the camera along with the notes. This takes place in 2 songs:

In Mistaken, On the Beatdrop Part, the Camera and UI will start to swing, These also takes care of moving notes. And will get even violent on the glitched part.

In The Incident, The Notes will Swing like a Snake and when the hard parts (AKA. The beggining) starts, The UI and Camera will Swing a little violent, they stop in some parts but then return after a second.

Vs Bob: In run, The UI Will shake to the beat as well as the camera, but the camera shake's intensity on the camera is too small enough to be unnoticed.

Bambi's Purgatory: In Opposition, On the middle of the song, the UI will rotate as expunged sings.