Seeds

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

• Seeds will be the same on every platform as long as the game version is also the same. For example, if you find a Rebirth seed on PC, you can use it on the 3DS version and it will be the same because the 3DS version only has Rebirth.
• 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.
• 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. [As of Repentance, there is a total of 40 special seeds]
• 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,uuuuuuuu	Description	Effects
Miscellaneous
16	BASE MENT	Infinite basements	The Basement repeats infinitely.
11	KEEP AWAY	Tricky pickups	Pickups mimic Isaac's movements.
72	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 100000000 coins, but all items and consumables must be bought.
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.
32	C0ME BACK	Enemies respawn	Enemies, including bosses, respawn once Isaac leaves the room. Completing a room multiple times does not yield additional pickups.
71	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.
73	ALM1 GHTY	Dog mode	Isaac is invincible.
55	K1DS M0DE	Kids' co-op mode	Makes co-op babies invincible.
79	GFVE LLLL	G Fuel!	Spawns a G FUEL! item in the starting room of each floor. Each copy picked up has different effects and adds various excessive "gamer style" visual and sound effects to the gameplay. Enables an item blacklist consisting of: Dr. Fetus, Mom's Eye, Technology, Loki's Horns, Mom's Knife, Brimstone, Technology 2, Epic Fetus, Monstro's Lung, The Ludovico Technique, Marked, Tech X, Trisagion, Spirit Sword, C Section.
Curses
56	DARK NESS	Permanent darkness	Permanent Curse of Darkness.
57	LABY RNTH	Inescapable labyrinth	Permanent Curse of the Labyrinth.
58	L0ST	Hopelessly lost	Permanent Curse of the Lost.
59	VNKN 0WN	Forever unknown	Permanent Curse of the Unknown.
60	MAZE	Unending maze	Permanent Curse of the Maze.
61	BL1N D	Incurable blindness	Permanent Curse of the Blind.
62	CVRS ED	Horrible curse	Permanent Curse of the Cursed.
Curse Immunity
63	N1TE L1TE	Illuminate darkness	Provides immunity to Curse of Darkness.
64	THRE AD	Escape the labyrinth	Provides immunity to Curse of the Labyrinth.
65	F0VN D	I once was lost	Provides immunity to Curse of the Lost.
66	N0W1 KN0W	Know the unknown	Provides immunity to Curse of the Unknown.
67	PATH F1ND	Stay out of the maze	Provides immunity to Curse of the Maze.
68	BRA1 LLE	Heal the blind	Provides immunity to Curse of the Blind.
70	BLCK CNDL	Total curse immunity	Provides immunity to all curses.
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	1CES KATE	Ice physics	Makes the ground slippery.
74	BRAV ERY	Bravery	Isaac automatically fires tears in the same direction that he moves. Removes the ability to fire tears manually.
75	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	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.
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.
17	C0CK FGHT	Charmed enemies	All enemies are permanently charmed.
18	C0NF ETT1	Confused enemies	All enemies are permanently confused.
19	FEAR M1NT	Scaredy enemies	All enemies are permanently scared.
20	FRA1 DN0T	Skittish enemies	Every few seconds, all enemies become scared.
21	CLST RPH0	Asocial enemies	All enemies are permanently charmed and scared.
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 and vice versa.
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	SVPE RH0T	SuperHot	While Isaac is not moving, time runs extremely slowly. Isaac's speed and fire rate remain normal at all times.
78	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 Kidney Stone.
• When the seed PACI FISM is enabled, effects that kill enemies on impact such as Euthanasia and Little Horn still remove enemies, but they will respawn when the room is re-entered. No effect occurs after killing all in a room.
• Some seeds can not be enabled alongside other certain seeds. For example, the PTCH BLCK seed cannot be enabled alongside THEB LANK.
• It is possible to access other chapters while playing the BASE MENT seed. Stepping into the beam of light after using Genesis can take Isaac to chapter II, avoiding the standard loop after the first two basement floors. Additionally, Sacrifice Rooms after 12 uses can be used at any point to teleport to the Dark Room, making it possible to see a proper ending and finish the run.

Trivia

• Many of the special seeds can be found by using either the Fortune Telling Machine 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.
• Although the T1NY D0ME seed also makes Isaac's hitbox somewhat smaller and could be considered beneficial, it does not prevent achievements.
• The "SVPE RH0T" seed is a reference to the game SUPERHOT.
• "M0DE SEVN" i.e. Mode 7 is a graphics mode on the Super Nintendo Entertainment System console that often results in pronounced pixelation.
• "GFVE LLLL" is used as 11/4/2022 and 3/24/2023's daily runs.
• While using Tainted Forgotten in the "SVPE RH0T" seed, time will only move when the skeleton moves.

Bugs

Bug!	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 audio speed will cause the main menu audio to remain altered. This resets upon entering a new run, or exiting the game.

Bug!	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.

The Binding of Isaac: Rebirth
Achievements Challenges Completion Marks Items Trinkets Characters Chapters Rooms Transformations Attributes Bosses Monsters Pickups Modes Curses Objects Seeds Effects Endings
Collection Item Pools Version History Modding Music