User:MasterEric/MechSandbox

This page seeks to be a comprehensive index of custom mod mechanics. There are a large number of mods with unique mechanics and not all are included here. See Mods with new game mechanics|Mods with new game mechanics and Mods with special notes or status effects|Mods with special notes or status effects

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.

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.
 * 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.
 * vs Monika: During Your Demise, 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.

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 150% of their HP over 3 seconds.
 * Shaggy x Matt: During the bonus song, Matt uses fire notes which deal massive damage if missed.

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:


 * Friday Night Funkin' VS v: 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.

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.
 * 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.
 * 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.

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.

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: vs Bob 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, similar to the Cheeky mod.
 * vs Cheeky: During Devil's Jello and Bedrock, Cheeky will occasionally obscure Boyfriend's side of the screen with an ad.

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:


 * Friday Night Funkin' VS v: During the bonus song featuring Cancer Lord, one of his minions will flip the player's strumline, inverting the notes they must hit.

Moving or Hidden Strumlines
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 strumlines around.
 * vs Cheeky: During Hard 2 Break, the strumlines will move in circles.
 * vs Bob: During Onslaught, the strumlines are manipulated in many ways.
 * He will rotate the notes in the strumline to distract the player.
 * He will hide the strumline so that the player must predict where the strumline is located to hit the notes.

Extra Note Keys


Some mods implement extra keys into the strumline, 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: Four 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 God Eater, 9 notes are used (two full sets of arrows and a ninth arrow).
 * Shaggy x Matt: Three songs use this mechanic:
 * Revenge uses 6 notes.
 * Final Destination and Final Destination (God Mode) use 9 notes.

Spacebar Spam


Some mods may require you to spam an extra key (usually the spacebar) in order to avoid some negative consequence. Unlike extra

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.