Binding of Isaac: Rebirth Wiki
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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.
  • Added in Afterbirth 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

ID Seed Description Effects
Miscellaneous
16 BASE
MENT
Infinite basements The Basement repeats infinitely. Disables achievements
11 KEEP
AWAY
Tricky pickups Pickups mimic Isaac's movements. Disables achievements
72 Added in Afterbirth
G0NE
S00N
Pickups time out Pickups quickly fade. This includes pedestal items, shop purchases, devil deals, and the Cathedral/Sheol boss chest.
33 FREE
2PAY
F2P version Isaac starts with 69 coins, but all items and consumables must be bought. Disables achievements
25 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
32 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
71 Added in Afterbirth
N0RE
TVRN
Point of no return Boss rooms lock Isaac in, similar to the Mom fight.
24 BRWN
SNKE
Poopy trail Isaac leaves a trail of poop behind him as he walks. Disables achievements
73 Added in Afterbirth
ALM1
GHTY
Dog mode Isaac is invincible. Disables achievements
55 K1DS
M0DE
Kids' co-op mode Makes co-op babies invincible. Disables achievements
Curses
56 Added in Afterbirth
DARK
NESS
Permanent darkness Permanent Curse of Darkness.
57 Added in Afterbirth
LABY
RNTH
Inescapable labyrinth Permanent Curse of the Labyrinth. Disables achievements
58 Added in Afterbirth
L0ST
Hopelessly lost Permanent Curse of the Lost.
59 Added in Afterbirth
VNKN
0WN
Forever unknown Permanent Curse of the Unknown.
60 Added in Afterbirth
MAZE
Unending maze Permanent Curse of the Maze.
61 Added in Afterbirth
BL1N
D
Incurable blindness Permanent Curse of the Blind.
62 Added in Afterbirth
CVRS
ED
Horrible curse Permanent Curse of the Cursed.
Curse Immunity
63 Added in Afterbirth
N1TE
L1TE
Illuminate darkness Provides immunity to Curse of Darkness. Disables achievements
64 Added in Afterbirth
THRE
AD
Escape the labyrinth Provides immunity to Curse of the Labyrinth. Disables achievements
65 Added in Afterbirth
F0VN
D
I once was lost Provides immunity to Curse of the Lost. Disables achievements
66 Added in Afterbirth
N0W1
KN0W
Know the unknown Provides immunity to Curse of the Unknown. Disables achievements
67 Added in Afterbirth
PATH
F1ND
Stay out of the maze Provides immunity to Curse of the Maze. Disables achievements
68 Added in Afterbirth
BRA1
LLE
Heal the blind Provides immunity to Curse of the Blind. Disables achievements
70 Added in Afterbirth
BLCK
CNDL
Total curse immunity Provides immunity to all curses. Disables achievements
Damage Modifiers
47 HARD
HARD
Full heart damage Isaac takes a full heart of damage from all sources.
48 BRTL
B0NS
Twelve heart damage Isaac takes twelve hearts of damage from all sources.
26 D0NT
ST0P
Don't stop moving Isaac takes damage if he stops moving.
27 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.
28 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
52 Added in Afterbirth
1CES
KATE
Ice physics Makes the ground slippery.
74 Added in Afterbirth
BRAV
ERY
Bravery Isaac automatically fires tears in the same direction that he moves. Removes the ability to fire tears manually.
75 Added in Afterbirth
C0WR
D1CE
Cowardice Isaac automatically fires tears in the opposite direction that he moves. Removes the ability to fire tears manually.
12 DRAW
KCAB
Reversed controls All movement and firing keys are reversed.
76 Added in Afterbirth
AX1S
ALGN
Axis aligned controls Isaac cannot move diagonally.
Camouflage
3 CAM0
K1DD
Camouflage player Isaac blends into the ground.
4 CAM0
F0ES
Camouflage enemies All enemies blend into the ground.
5 CAM0
DR0P
Camouflage stuff Pickups and items blend into the ground.
6 WH0A
WHAT
Camouflage EVERYTHING! Isaac, enemies, pickups, and items all blend into the ground.
14 1MN0
B0DY
Invisible player Isaac becomes completely invisible.
15 BL1N
DEYE
Invisible enemies All enemies become completely invisible.
Player Appearance
46 THEB
LANK
The blank Isaac has no face.
53 KAPP
A
Grayscale Isaac turns gray.
54 H0H0
H0H0
Christmas Isaac wears a Christmas hat.
35 T0PH
EAVY
Big head mode Isaac's head is large.
36 T1NY
D0ME
Tiny head mode Isaac's head is small.
37 PTCH
BLCK
Black body Isaac and his tears turn completely black.
Visual Effects
38 TEAR
GL0W
Glowing tears Isaac's tears glow. Disables achievements
23 BL00
00DY
Extra gore Makes a lot more blood appear after enemies die.
HUD Modifiers
8 B00B
T00B
Cathode rays! Applies a filter that makes the game look like it's being played through a cathode ray tube.
9 DYSL
EX1A
Dyslexia All in-game text is rearranged.
10 KEEP
TRAK
No HUD Removes the HUD entirely. This affects the map, health, consumables, held items, pickup text, floor names, and more.
29 MED1
C1NE
Mystery pills All pill names and descriptions show ???.
30 FACE
D0WN
Mystery cards All card names and descriptions show ???.
Enemy Modifiers
13 CHAM
P10N
Champion enemies All enemies turn into champions if possible. Disables achievements
17 C0CK
FGHT
Charmed enemies All enemies are permanently charmed. Disables achievements
18 C0NF
ETT1
Confused enemies All enemies are permanently confused. Disables achievements
19 FEAR
M1NT
Scaredy enemies All enemies are permanently scared. Disables achievements
20 FRA1
DN0T
Skittish enemies Every few seconds, all enemies become scared. Disables achievements
21 CLST
RPH0
Asocial enemies All enemies are permanently charmed and scared. Disables achievements
Sound Modifiers
7 FART
SNDS
Farty sounds All sound effects are replaced with farts.
1 SL0W
4ME2
Movement tempo Music speed is affected by Isaac's walking speed.
2 HART
BEAT
Health tempo The lower Isaac's health is, the slower the music is.
41 ANDA
NTE
Downtempo Music is slowed down.
42 LARG
HET0
Downtempo-- Music is significantly slowed down.
43 ALLE
GR0
Uptempo Music is sped up.
44 PRES
T0
Uptempo++ Music is significantly sped up.
Video Games?
77 Added 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
78 Added 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 Added in AfterbirthKidney Stone Kidney 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! Added in Afterbirth 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! Added in Repentance The PAC1F1SM seed does not allow you to finish a The Beast run. Dogma never transforms in his second phase. If you manage to go to the Beast fight (with the debug console), the Chest spawns before Ultra Famine is killed.

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.
  • Added in Repentance The "SVPE RH0T" seed is a reference to the game SUPERHOT.
  • Added 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.


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