Binding of Isaac: Rebirth Wiki
Register
(Added Seed count information)
Tag: Visual edit
(→‎Bugs: PAC1F1SM bug on The Beast)
(20 intermediate revisions by 18 users not shown)
Line 1: Line 1:
 
{{#ev:youtube|hBHN6_yuy20|350|right}}
 
{{#ev:youtube|hBHN6_yuy20|350|right}}
 
<div class='page item'></div>
 
<div class='page item'></div>
'''Seeds''', essentially random strings of characters, are used as the basis for all decision making in the game. By inputting a seed manually, you can guarantee that most randomly-generated decisions will occur the same every time. For instance, two players using the same seed will find the same items in the same locations.
+
'''Seeds''', essentially random strings of characters, are used as the basis for all decision making in the game. By inputting a seed manually, one can guarantee that most randomly-generated decisions will occur the same every time. For instance, two players using the same seed will find the same items in the same locations.
   
 
==Notes Regarding Seed Entry==
 
==Notes Regarding Seed Entry==
Line 7: Line 7:
 
* Special seeds do not affect level generation.
 
* Special seeds do not affect level generation.
 
* All alphanumeric characters are accepted except for 5, I, O, and U. On the PC version pressing the I, O, and U keys during seed entry will replace them with 1, 0, and V respectively.
 
* All alphanumeric characters are accepted except for 5, I, O, and U. On the PC version pressing the I, O, and U keys during seed entry will replace them with 1, 0, and V respectively.
*There are around 34 359 738 368 possible Seeds.
 
 
* {{dlc|a}} Once a special seed has been entered, it will be permanently unlocked without needing to enter the code again. Pressing '''Q''' / '''Left Bumper''' during character selection will bring up the Easter Egg Section, in which any previously unlocked game mode can be selected. Selecting multiple modes at once is also possible.
 
* {{dlc|a}} Once a special seed has been entered, it will be permanently unlocked without needing to enter the code again. Pressing '''Q''' / '''Left Bumper''' during character selection will bring up the Easter Egg Section, in which any previously unlocked game mode can be selected. Selecting multiple modes at once is also possible.
  +
*On the special seed selection menu, it is possible to remove a discovered seed by focusing it and pressing Q+E+Tab on keyboard or LB+RB+X on controller.
   
 
==Special Seeds==
 
==Special Seeds==
Line 20: Line 20:
 
|BASE<br>MENT
 
|BASE<br>MENT
 
|Infinite basements
 
|Infinite basements
|[[The Basement]] repeats infinitely.
+
|[[The Basement]] repeats infinitely. {{No unlocks}}
 
|-
 
|-
 
|KEEP<br>AWAY
 
|KEEP<br>AWAY
 
|Tricky pickups
 
|Tricky pickups
|[[Pickups]] mimic Isaac's movements.
+
|[[Pickups]] mimic Isaac's movements. {{No unlocks}}
 
|-
 
|-
 
|{{dlc|a}}<br>G0NE<br>S00N
 
|{{dlc|a}}<br>G0NE<br>S00N
Line 32: Line 32:
 
|FREE<br>2PAY
 
|FREE<br>2PAY
 
|F2P version
 
|F2P version
|Isaac starts with 69 coins, but all items and consumables must be bought.
+
|Isaac starts with 69 coins, but all items and consumables must be bought. {{No unlocks}}
 
|-
 
|-
 
|PAC1<br>F1SM
 
|PAC1<br>F1SM
 
|Pacifism
 
|Pacifism
|Enemies do not take damage. All doors stay open. When in a boss room, the boss's health slowly drains.
+
|Enemies do not take damage. All rooms are considered cleared upon entering them; doors stay open, room rewards spawn, [[Fatty#Stoney|Stonies]] instantly die. When in a boss room, the boss's health bar is used as a timer and slowly ticks down. At the end of the countdown, the trapdoor to the next floor appears. {{No unlocks}}
 
|-
 
|-
 
|C0ME<br>BACK
 
|C0ME<br>BACK
 
|Enemies respawn
 
|Enemies respawn
|Enemies, including bosses, respawn once Isaac leaves the room. Completing a room multiple times does not yield additional pickups.
+
|Enemies, including bosses, respawn once Isaac leaves the room. Completing a room multiple times does not yield additional pickups. {{No unlocks}}
 
|-
 
|-
 
|{{dlc|a}}<br>N0RE<br>TVRN
 
|{{dlc|a}}<br>N0RE<br>TVRN
Line 48: Line 48:
 
|BRWN<br>SNKE
 
|BRWN<br>SNKE
 
|Poopy trail
 
|Poopy trail
|Isaac leaves a trail of poop behind him as he walks.
+
|Isaac leaves a trail of poop behind him as he walks. {{No unlocks}}
 
|-
 
|-
 
|{{dlc|a}}<br>ALM1<br>GHTY
 
|{{dlc|a}}<br>ALM1<br>GHTY
|Dog mode
+
|Dog mode
|Isaac is invincible.
+
|Isaac is invincible. {{No unlocks}}
 
|-
 
|-
 
|K1DS<br>M0DE
 
|K1DS<br>M0DE
 
|Kids' co-op mode
 
|Kids' co-op mode
|Makes [[Babies|co-op babies]] invincible.
+
|Makes [[Babies|co-op babies]] invincible. {{No unlocks}}
 
|-
 
|-
 
|colspan="3" style="background:#142e59" | '''[[Curses]]'''
 
|colspan="3" style="background:#142e59" | '''[[Curses]]'''
Line 66: Line 66:
 
|{{dlc|a}}<br>LABY<br>RNTH
 
|{{dlc|a}}<br>LABY<br>RNTH
 
|Inescapable labyrinth
 
|Inescapable labyrinth
|Permanent Curse of the Labyrinth.
+
|Permanent Curse of the Labyrinth. {{No unlocks}}
 
|-
 
|-
 
|{{dlc|a}}<br>L0ST
 
|{{dlc|a}}<br>L0ST
Line 92: Line 92:
 
|{{dlc|a}}<br>N1TE<br>L1TE
 
|{{dlc|a}}<br>N1TE<br>L1TE
 
|Illuminate darkness
 
|Illuminate darkness
|Provides immunity to Curse of Darkness.
+
|Provides immunity to Curse of Darkness. {{No unlocks}}
 
|-
 
|-
 
|{{dlc|a}}<br>THRE<br>AD
 
|{{dlc|a}}<br>THRE<br>AD
 
|Escape the labyrinth
 
|Escape the labyrinth
|Provides immunity to Curse of the Labyrinth.
+
|Provides immunity to Curse of the Labyrinth. {{No unlocks}}
 
|-
 
|-
 
|{{dlc|a}}<br>F0VN<br>D
 
|{{dlc|a}}<br>F0VN<br>D
 
|I once was lost
 
|I once was lost
|Provides immunity to Curse of the Lost.
+
|Provides immunity to Curse of the Lost. {{No unlocks}}
 
|-
 
|-
 
|{{dlc|a}}<br>N0W1<br>KN0W
 
|{{dlc|a}}<br>N0W1<br>KN0W
 
|Know the unknown
 
|Know the unknown
|Provides immunity to Curse of the Unknown.
+
|Provides immunity to Curse of the Unknown. {{No unlocks}}
 
|-
 
|-
 
|{{dlc|a}}<br>PATH<br>F1ND
 
|{{dlc|a}}<br>PATH<br>F1ND
 
|Stay out of the maze
 
|Stay out of the maze
|Provides immunity to Curse of the Maze.
+
|Provides immunity to Curse of the Maze. {{No unlocks}}
 
|-
 
|-
 
|{{dlc|a}}<br>BRA1<br>LLE
 
|{{dlc|a}}<br>BRA1<br>LLE
 
|Heal the blind
 
|Heal the blind
|Provides immunity to Curse of the Blind.
+
|Provides immunity to Curse of the Blind. {{No unlocks}}
 
|-
 
|-
 
|{{dlc|a}}<br>BLCK<br>CNDL
 
|{{dlc|a}}<br>BLCK<br>CNDL
 
|Total curse immunity
 
|Total curse immunity
|Provides immunity to all curses.
+
|Provides immunity to all curses. {{No unlocks}}
 
|-
 
|-
 
|colspan="3" style="background:#142e59" | '''Damage Modifiers'''
 
|colspan="3" style="background:#142e59" | '''Damage Modifiers'''
Line 134: Line 134:
 
|THEG<br>H0ST
 
|THEG<br>H0ST
 
|Damage on a timer
 
|Damage on a timer
|Every 45 seconds, a ticking will begin, and after 5 seconds, Isaac will take 1/2 heart of damage. Damage increases to 1 heart in the womb and below. Having invincibility during the time when damage should be inflicted prevents the damage.
+
|Every 45 seconds, a ticking will begin, and after 5 seconds, Isaac will take 1/2 heart of damage. Damage increases to 1 heart in Chapter 4 and beyond. Having invincibility during the time when damage should be inflicted blocks the damage.
 
|-
 
|-
 
|30M1<br>N1TS
 
|30M1<br>N1TS
Line 148: Line 148:
 
|{{dlc|a}}<br>BRAV<br>ERY
 
|{{dlc|a}}<br>BRAV<br>ERY
 
|Bravery
 
|Bravery
|Isaac fires tears in the same direction that he moves. Removes the normal ability to fire tears.
+
|Isaac automatically fires tears in the same direction that he moves. Removes the ability to fire tears manually.
 
|-
 
|-
 
|{{dlc|a}}<br>C0WR<br>D1CE
 
|{{dlc|a}}<br>C0WR<br>D1CE
 
|Cowardice
 
|Cowardice
|Isaac fires tears in the opposite direction that he moves. Removes the normal ability to fire tears.
+
|Isaac automatically fires tears in the opposite direction that he moves. Removes the ability to fire tears manually.
 
|-
 
|-
 
|DRAW<br>KCAB
 
|DRAW<br>KCAB
Line 218: Line 218:
 
|TEAR<br>GL0W
 
|TEAR<br>GL0W
 
|Glowing tears
 
|Glowing tears
|Isaac's tears glow.
+
|Isaac's tears glow. {{No unlocks}}
 
|-
 
|-
 
|BL00<br>00DY
 
|BL00<br>00DY
Line 250: Line 250:
 
|CHAM<br>P10N
 
|CHAM<br>P10N
 
|Champion enemies
 
|Champion enemies
|All enemies turn into [[Monsters#Champions|champions]] if possible.
+
|All enemies turn into [[Monsters#Champions|champions]] if possible. {{No unlocks}}
 
|-
 
|-
 
|C0CK<br>FGHT
 
|C0CK<br>FGHT
 
|Charmed enemies
 
|Charmed enemies
|All enemies are permanently [[Effects#Status Effects|charmed]].
+
|All enemies are permanently [[Effects#Status Effects|charmed]]. {{No unlocks}}
 
|-
 
|-
 
|C0NF<br>ETT1
 
|C0NF<br>ETT1
 
|Confused enemies
 
|Confused enemies
|All enemies are permanently [[Effects#Status Effects|confused]].
+
|All enemies are permanently [[Effects#Status Effects|confused]]. {{No unlocks}}
 
|-
 
|-
 
|FEAR<br>M1NT
 
|FEAR<br>M1NT
 
|Scaredy enemies
 
|Scaredy enemies
|All enemies are permanently [[Effects#Status Effects|scared]].
+
|All enemies are permanently [[Effects#Status Effects|scared]]. {{No unlocks}}
 
|-
 
|-
 
|FRA1<br>DN0T
 
|FRA1<br>DN0T
 
|Skittish enemies
 
|Skittish enemies
|Every few seconds, all enemies become [[Effects#Status Effects|scared]].
+
|Every few seconds, all enemies become [[Effects#Status Effects|scared]]. {{No unlocks}}
 
|-
 
|-
 
|CLST<br>RPH0
 
|CLST<br>RPH0
 
|Asocial enemies
 
|Asocial enemies
|All enemies are permanently [[Effects#Status Effects|charmed and scared]].
+
|All enemies are permanently [[Effects#Status Effects|charmed and scared]]. {{No unlocks}}
 
|-
 
|-
 
|colspan="3" style="background:#142e59" | '''Sound Modifiers'''
 
|colspan="3" style="background:#142e59" | '''Sound Modifiers'''
Line 301: Line 301:
 
|Uptempo++
 
|Uptempo++
 
|Music is significantly sped up.
 
|Music is significantly sped up.
  +
|-
  +
|colspan="3" style="background:#142e59" | '''Video Games?'''
  +
|-
  +
|{{dlc|r}}</br>SVPE<br/>RH0T
  +
|SuperHot
  +
|While Isaac is not moving, time runs extremely slowly. Isaac's speed and fire rate remain normal at all times. {{No unlocks}}
  +
|-
  +
|{{dlc|r}}</br>M0DE<br/>SEVN
  +
|Retro vision
  +
|Screen has a permanent [[Pills|Retro-Vision]] effect.
  +
|-
  +
 
|}
 
|}
   
 
==Notes Regarding Seed Effects==
 
==Notes Regarding Seed Effects==
* While the BRTL B0NS seed is enabled, getting hit will not result in death if Isaac possesses [[Hearts (Pickup)#Red Hearts|Red hearts]] as well as [[Hearts (Pickup)#Soul Hearts|Soul hearts]] or [[Hearts (Pickup)#Black Hearts|Black hearts]]. Instead, the Soul hearts and/or Black hearts will be completely depleted, leaving Isaac with only his Red hearts.
+
* While the BRTL B0NS seed is enabled, getting hit will not result in death if Isaac possesses [[Hearts (Pickup)#Red Hearts|Red hearts]] as well as [[Hearts (Pickup)#Soul Hearts|Soul hearts]] or [[Hearts (Pickup)#Black Hearts|Black hearts]]. Instead, the Soul hearts and/or Black hearts will be completely depleted, leaving Isaac with only his Red hearts. You can also prevent death with [[Bone Heart]]s, as they will get depleted without destroying the bone heart and protecting the rest of the hearts, and can be refilled with Red Hearts. The soul hearts in front of them will get destroyed though.
 
* If the ICES KATE seed is enabled, purple champion monsters will be much more dangerous, as escaping their gravitational pull is almost impossible.
 
* If the ICES KATE seed is enabled, purple champion monsters will be much more dangerous, as escaping their gravitational pull is almost impossible.
 
* When playing with the KAPP A seed enabled, certain items will override the grayscale, such as {{i|Kidney Stone}}.
 
* When playing with the KAPP A seed enabled, certain items will override the grayscale, such as {{i|Kidney Stone}}.
Line 312: Line 324:
 
{{bug|{{dlc|a}} Entering the [[Blue Womb]] while using the "N0RE TVRN" seed is not recommended as the door leading to the Boss Room will not spawn, thereby trapping the player and ending the run.}}
 
{{bug|{{dlc|a}} Entering the [[Blue Womb]] while using the "N0RE TVRN" seed is not recommended as the door leading to the Boss Room will not spawn, thereby trapping the player and ending the run.}}
 
{{bug|Returning to the menu from a run that uses a seed that alters the music speed will cause the main menu music to remain altered. This resets upon entering a new run, or exiting the game.}}
 
{{bug|Returning to the menu from a run that uses a seed that alters the music speed will cause the main menu music to remain altered. This resets upon entering a new run, or exiting the game.}}
  +
{{bug|{{dlc|r}} The PAC1F1SM seed does not allow you to finish a The Beast run. Dogma never transforms in his second phase and finish the run before Ultra Famine is killed in The Beast room.}}
   
 
==Trivia==
 
==Trivia==
Line 320: Line 333:
 
* The seeds "ANDA NTE", "LARG HET0", "ALLE GR0", and "PRES T0" refer to ''andante'', ''larghetto'', ''allegro'', and ''presto'', respectively. These are names of musical [[wikipedia:Tempo|tempos]], which are the speeds of given pieces of music.
 
* The seeds "ANDA NTE", "LARG HET0", "ALLE GR0", and "PRES T0" refer to ''andante'', ''larghetto'', ''allegro'', and ''presto'', respectively. These are names of musical [[wikipedia:Tempo|tempos]], which are the speeds of given pieces of music.
 
* The "KAPP A" seed is a reference to a commonly used Twitch emote "KAPPA".
 
* The "KAPP A" seed is a reference to a commonly used Twitch emote "KAPPA".
* The "ALM1 GHTY" seed's description is, "Dog Mode". This is referencing the term "God mode", which is used to describe someone or something in a game that's invincible, usually through the use of cheats.
+
* The "ALM1 GHTY" seed's description is, "Dog Mode". This is referencing the term "God mode", which is used to describe someone or something in a game that's invincible, usually through the use of cheats.
  +
**"Dog Mode" is also a reference to <u>Rise of the Triad</u>, which has a power-up of the same name.
  +
* The "FEAR M1NT" seed is a reference to spearmint, a popular chewing gum flavor.
  +
* {{dlc|r}} The "SVPE RH0T" seed is a [[Easter eggs|reference]] to the game ''SUPERHOT''.
  +
* {{dlc|r}} "M0DE SEVN" i.e. Mode 7 is a [[wikipedia:Mode 7|graphics mode]] on the Super Nintendo Entertainment System console that often results in pronounced pixelation.
   
 
{{nav}}
 
{{nav}}

Revision as of 20:53, 10 August 2021

Seeds, essentially random strings of characters, are used as the basis for all decision making in the game. By inputting a seed manually, one can guarantee that most randomly-generated decisions will occur the same every time. For instance, two players using the same seed will find the same items in the same locations.

Notes Regarding Seed Entry

  • Except for some special seeds, inputting a seed will cause the 'no trophies' mark to appear. This prevents any achievements from being obtained on that particular run.
  • Special seeds do not affect level generation.
  • All alphanumeric characters are accepted except for 5, I, O, and U. On the PC version pressing the I, O, and U keys during seed entry will replace them with 1, 0, and V respectively.
  • (except in Rebirth) Once a special seed has been entered, it will be permanently unlocked without needing to enter the code again. Pressing Q / Left Bumper during character selection will bring up the Easter Egg Section, in which any previously unlocked game mode can be selected. Selecting multiple modes at once is also possible.
  • On the special seed selection menu, it is possible to remove a discovered seed by focusing it and pressing Q+E+Tab on keyboard or LB+RB+X on controller.

Special Seeds

Seed Description Effects
Miscellaneous
BASE
MENT
Infinite basements The Basement repeats infinitely. Disables achievements
KEEP
AWAY
Tricky pickups Pickups mimic Isaac's movements. Disables achievements
(except in Rebirth)
G0NE
S00N
Pickups time out Pickups quickly fade. This includes pedestal items, shop purchases, devil deals, and the Cathedral/Sheol boss chest.
FREE
2PAY
F2P version Isaac starts with 69 coins, but all items and consumables must be bought. Disables achievements
PAC1
F1SM
Pacifism Enemies do not take damage. All rooms are considered cleared upon entering them; doors stay open, room rewards spawn, Stonies instantly die. When in a boss room, the boss's health bar is used as a timer and slowly ticks down. At the end of the countdown, the trapdoor to the next floor appears. Disables achievements
C0ME
BACK
Enemies respawn Enemies, including bosses, respawn once Isaac leaves the room. Completing a room multiple times does not yield additional pickups. Disables achievements
(except in Rebirth)
N0RE
TVRN
Point of no return Boss rooms lock Isaac in, similar to the Mom fight.
BRWN
SNKE
Poopy trail Isaac leaves a trail of poop behind him as he walks. Disables achievements
(except in Rebirth)
ALM1
GHTY
Dog mode Isaac is invincible. Disables achievements
K1DS
M0DE
Kids' co-op mode Makes co-op babies invincible. Disables achievements
Curses
(except in Rebirth)
DARK
NESS
Permanent darkness Permanent Curse of Darkness.
(except in Rebirth)
LABY
RNTH
Inescapable labyrinth Permanent Curse of the Labyrinth. Disables achievements
(except in Rebirth)
L0ST
Hopelessly lost Permanent Curse of the Lost.
(except in Rebirth)
VNKN
0WN
Forever unknown Permanent Curse of the Unknown.
(except in Rebirth)
MAZE
Unending maze Permanent Curse of the Maze.
(except in Rebirth)
BL1N
D
Incurable blindness Permanent Curse of the Blind.
(except in Rebirth)
CVRS
ED
Horrible curse Permanent Curse of the Cursed.
Curse Immunity
(except in Rebirth)
N1TE
L1TE
Illuminate darkness Provides immunity to Curse of Darkness. Disables achievements
(except in Rebirth)
THRE
AD
Escape the labyrinth Provides immunity to Curse of the Labyrinth. Disables achievements
(except in Rebirth)
F0VN
D
I once was lost Provides immunity to Curse of the Lost. Disables achievements
(except in Rebirth)
N0W1
KN0W
Know the unknown Provides immunity to Curse of the Unknown. Disables achievements
(except in Rebirth)
PATH
F1ND
Stay out of the maze Provides immunity to Curse of the Maze. Disables achievements
(except in Rebirth)
BRA1
LLE
Heal the blind Provides immunity to Curse of the Blind. Disables achievements
(except in Rebirth)
BLCK
CNDL
Total curse immunity Provides immunity to all curses. Disables achievements
Damage Modifiers
HARD
HARD
Full heart damage Isaac takes a full heart of damage from all sources.
BRTL
B0NS
Twelve heart damage Isaac takes twelve hearts of damage from all sources.
D0NT
ST0P
Don't stop moving Isaac takes damage if he stops moving.
THEG
H0ST
Damage on a timer Every 45 seconds, a ticking will begin, and after 5 seconds, Isaac will take 1/2 heart of damage. Damage increases to 1 heart in Chapter 4 and beyond. Having invincibility during the time when damage should be inflicted blocks the damage.
30M1
N1TS
30 minute limit Gives a time limit of 30 minutes to beat the game. When the timer hits 29:45, a timer starts ticking, and after 30:00, Isaac takes damage every second.
Control Modifiers
(except in Rebirth)
1CES
KATE
Ice physics Makes the ground slippery.
(except in Rebirth)
BRAV
ERY
Bravery Isaac automatically fires tears in the same direction that he moves. Removes the ability to fire tears manually.
(except in Rebirth)
C0WR
D1CE
Cowardice Isaac automatically fires tears in the opposite direction that he moves. Removes the ability to fire tears manually.
DRAW
KCAB
Reversed controls All movement and firing keys are reversed.
(except in Rebirth)
AX1S
ALGN
Axis aligned controls Isaac cannot move diagonally.
Camouflage
CAM0
K1DD
Camouflage player Isaac blends into the ground.
CAM0
F0ES
Camouflage enemies All enemies blend into the ground.
CAM0
DR0P
Camouflage stuff Pickups and items blend into the ground.
WH0A
WHAT
Camouflage EVERYTHING! Isaac, enemies, pickups, and items all blend into the ground.
1MN0
B0DY
Invisible player Isaac becomes completely invisible.
BL1N
DEYE
Invisible enemies All enemies become completely invisible.
Player Appearance
THEB
LANK
The blank Isaac has no face.
KAPP
A
Grayscale Isaac turns gray.
H0H0
H0H0
Christmas Isaac wears a Christmas hat.
T0PH
EAVY
Big head mode Isaac's head is large.
T1NY
D0ME
Tiny head mode Isaac's head is small.
PTCH
BLCK
Black body Isaac and his tears turn completely black.
Visual Effects
TEAR
GL0W
Glowing tears Isaac's tears glow. Disables achievements
BL00
00DY
Extra gore Makes a lot more blood appear after enemies die.
HUD Modifiers
B00B
T00B
Cathode rays! Applies a filter that makes the game look like it's being played through a cathode ray tube.
DYSL
EX1A
Dyslexia All in-game text is rearranged.
KEEP
TRAK
No HUD Removes the HUD entirely. This affects the map, health, consumables, held items, pickup text, floor names, and more.
MED1
C1NE
Mystery pills All pill names and descriptions show ???.
FACE
D0WN
Mystery cards All card names and descriptions show ???.
Enemy Modifiers
CHAM
P10N
Champion enemies All enemies turn into champions if possible. Disables achievements
C0CK
FGHT
Charmed enemies All enemies are permanently charmed. Disables achievements
C0NF
ETT1
Confused enemies All enemies are permanently confused. Disables achievements
FEAR
M1NT
Scaredy enemies All enemies are permanently scared. Disables achievements
FRA1
DN0T
Skittish enemies Every few seconds, all enemies become scared. Disables achievements
CLST
RPH0
Asocial enemies All enemies are permanently charmed and scared. Disables achievements
Sound Modifiers
FART
SNDS
Farty sounds All sound effects are replaced with farts.
SL0W
4ME2
Movement tempo Music speed is affected by Isaac's walking speed.
HART
BEAT
Health tempo The lower Isaac's health is, the slower the music is.
ANDA
NTE
Downtempo Music is slowed down.
LARG
HET0
Downtempo-- Music is significantly slowed down.
ALLE
GR0
Uptempo Music is sped up.
PRES
T0
Uptempo++ Music is significantly sped up.
Video Games?
(in Repentance)
SVPE
RH0T
SuperHot While Isaac is not moving, time runs extremely slowly. Isaac's speed and fire rate remain normal at all times. Disables achievements
(in Repentance)
M0DE
SEVN
Retro vision Screen has a permanent Retro-Vision effect.

Notes Regarding Seed Effects

  • While the BRTL B0NS seed is enabled, getting hit will not result in death if Isaac possesses Red hearts as well as Soul hearts or Black hearts. Instead, the Soul hearts and/or Black hearts will be completely depleted, leaving Isaac with only his Red hearts. You can also prevent death with Bone Hearts, as they will get depleted without destroying the bone heart and protecting the rest of the hearts, and can be refilled with Red Hearts. The soul hearts in front of them will get destroyed though.
  • If the ICES KATE seed is enabled, purple champion monsters will be much more dangerous, as escaping their gravitational pull is almost impossible.
  • When playing with the KAPP A seed enabled, certain items will override the grayscale, such as (except in Rebirth)Collectible Kidney Stone iconKidney Stone.
  • Some seeds can not be enabled alongside other certain seeds. For example, the PTCH BLCK seed cannot be enabled alongside THEB LANK.

Bugs

Bug Bug! (except in Rebirth) Entering the Blue Womb while using the "N0RE TVRN" seed is not recommended as the door leading to the Boss Room will not spawn, thereby trapping the player and ending the run.
Bug Bug! Returning to the menu from a run that uses a seed that alters the music speed will cause the main menu music to remain altered. This resets upon entering a new run, or exiting the game.
Bug Bug! (in Repentance) The PAC1F1SM seed does not allow you to finish a The Beast run. Dogma never transforms in his second phase and finish the run before Ultra Famine is killed in The Beast room.

Trivia

  • Many of the special seeds can be found by using either the Fortune Teller or the Rules Card.
  • Some special seeds were shared with the community by the developers.
  • If an item that would appear on a seed isn't unlocked yet, it will be replaced by another item that is unlocked.
  • The "DYSL EXIA" seed is a reference to dyslexia, a disorder that causes difficulties in spelling, reading, and writing.
  • The seeds "ANDA NTE", "LARG HET0", "ALLE GR0", and "PRES T0" refer to andante, larghetto, allegro, and presto, respectively. These are names of musical tempos, which are the speeds of given pieces of music.
  • The "KAPP A" seed is a reference to a commonly used Twitch emote "KAPPA".
  • The "ALM1 GHTY" seed's description is, "Dog Mode". This is referencing the term "God mode", which is used to describe someone or something in a game that's invincible, usually through the use of cheats.
    • "Dog Mode" is also a reference to Rise of the Triad, which has a power-up of the same name.
  • The "FEAR M1NT" seed is a reference to spearmint, a popular chewing gum flavor.
  • (in Repentance) The "SVPE RH0T" seed is a reference to the game SUPERHOT.
  • (in Repentance) "M0DE SEVN" i.e. Mode 7 is a graphics mode on the Super Nintendo Entertainment System console that often results in pronounced pixelation.