▲
1
▼
As recently as the game's third update, the passive item "Money=Power" contained a typo that made it appear as "Monkey=Power". This would be patched out in a future update.
▲
1
▼
According to developer Edmund McMillen, the working title for The Binding of Isaac was "Love Sick" and was later changed to "Mom" before it eventually became The Binding of Isaac.
▲
1
▼

▲
1
▼
Completing the Chest with any character is supposed to unlock an item and an achievement after the first attempt. While the in-game award is correct, the Steam achievements are glitched, where beating the Chest with one character will unlock the achievement of another. This goes for all characters excluding Maggy and Isaac.
▲
1
▼
The fez on Judas' head is a referential jab at FEZ creator Phil Fish, who voted against Edmund McMillen and his team at the Independent Games Festival. The name "Judas" likely was intended to evoke Judas Iscariot of the New Testament, and suggests that the character Judas represents Fish's betrayal of Edmund.
▲
1
▼
The character "???" also known as the Blue Baby, is a reference to both Edmund McMillen's Newgrounds username, BlueBaby, and one of his earliest Newgrounds submissions, "Dead Baby Dressup".
▲
1
▼

▲
1
▼
The item "Bible" can not only give you wings for usage of one room, but can also kill Mother during the fight with her, or you if you decide to use it while fighting Satan.
▲
1
▼
"I Am Error" is a rare, special room that only has a 6.66% chance of being accessible when using telepills. The name and appearance of the character in the room references Zelda II: The Adventure of Link.
Related Games
The Binding of Isaac: Rebirth
The Basement Collection
The Flintstones: Bedrock Bowling
The Wolf Among Us
Sonic & Sega All-Stars Racing
Guitar Hero: Aerosmith
Huniepop
Angry Video Game Nerd I & II Deluxe
Don't Starve
Blasphemous II
Teenage Mutant Ninja Turtles: Mutants in Manhattan
Liyla and the Shadows of War
The Great Ace Attorney Chronicles
Skull and Bones
Medal of Honor: Allied Assault
Street Fighter X Tekken
Sonic Superstars
My Time at Portia
FIFA Soccer 13
Lisa: The Painful
Star Wars: Knights of the Old Republic III
LEGO Star Wars: The Force Awakens
RuneScape
The Longest Journey
No More Heroes
Call of Duty
Dropsy
Giana Sisters: Twisted Dreams
Cheggers' Party Quiz
Age of Empires
Crash Bandicoot 4: It's About Time
Enter the Matrix
Hugo II, Whodunit?
The Joy of Creation: Ignited Collection
Shantae: Half-Genie Hero
Balan Wonderworld
Postal 4: No Regerts
Madden NFL 2001
State of Decay
Railroad Tycoon II
Star Wars: Dark Forces
Landstalker
Zoo Tycoon 2
Star Wars Battlefront
Leisure Suit Larry: Magna Cum Laude
Freddi Fish 4: The Case of the Hogfish Rustlers of Briny Gulch
Titan A.E.
Sonic Adventure DX: Director's Cut
The Quiet Man
Stubbs the Zombie in Rebel Without a Pulse