The Binding of Isaac Flash Save Editor

An editor for The Binding of Isaac (Flash version) serial.txt save file. It can be used to unlock items, secrets and change your stats.

Features

• Parses and extracts data from serial.txt save files.
• Provides a structured way to manipulate save data.
• Has a command-line interface.

NOTE: This project is not well-tested. Make sure to back up your game data before using it. Copy both the serial.txt and so.sol files to ensure you can recover your progress if anything goes wrong. Please contact me if anything goes wrong and I'll try to fix fix the bug that caused it.

Installation

To install the editor as a library, run the following command:

npm install tboi-flash-save-editor

To install as a cli:

npm install -g tboi-flash-save-editor

Common Questions

1. Where is serial.txt?

The serial.txt file is typically found in the game's directory, alongside the executable.

• Windows: ..\Steam\steamapps\common\The Binding Of Isaac\
• Mac: ~/Library/Application Support/Steam/SteamApps/common/the binding of isaac rebirth/
• Linux: ~/.steam/steam/steamapps/common//The Binding Of Isaac/

2. My progress isn't updating or nothing gets unlocked!

If your save data doesn't seem to update, try deleting your so.sol file. This file is deprecated but still used by the game to sync with serial.txt.

• Windows: %appdata%\Macromedia\Flash Player\#SharedObjects\<some random string>\localhost\
• Mac: ~/Library/Preferences/Macromedia/Flash Player/#SharedObjects/4UUE5CSF/localhost/
• Linux: ~/.macromedia/Flash_Player/#SharedObjects/randomstring/localhost/so.sol

For more information, refer to this article on The Binding of Isaac Wiki.

Usage

Command line interface

$ tboi-flash-save-editor -h
Usage: tboi-flash-save-editor [savefile] [outputfile] [options]

An editor for The Binding of Isaac serial.txt save file

Arguments:
  savefile                              Specify the path to the save file (e.g., serial.txt).
  outputfile                            Specify the path for the output save file. If omitted, the modified save data is printed to stdout.

Options:
  -v, --version                         Output the version number.
  -s, --stats                           Display detailed statistics from the save file.
  -U, --unlock-all                      Unlock all items and secrets.
  -i, --unlock-item <name...>           Unlock one or more specified items.
  -l, --lock-item <name...>             Lock one or more specified items.
  -S, --unlock-secret <name...>         Unlock one or more specified secrets.
  -k, --lock-secret <name...>           Lock one or more specified secrets.
  -f, --set-floor <floor,count>         Set the amount of times a specific floor was completed.
  -m, --set-mini-boss <miniboss,count>  Set the amount of times a specific mini-boss was defeated.
  -b, --set-boss <boss,count>           Set the amount of times a specific boss was defeated.
  -t, --set-stat <stat,count>           Set the count for a specific game statistic.
  -L, --locked                          List all locked secrets and items in the save file.
  -d, --display <type>                  Display a list of all available "stats", "items", "secrets", "bosses", "mini-bosses" and "floors".
  -h, --help                            Print this message.


Examples:
  tboi-flash-save-editor serial.txt -s  View the statistics from serial.txt file
  tboi-flash-save-editor -d bosses  View all the bosses in the game
  tboi-flash-save-editor serial.txt -i D20 BOX -t 'Deaths Count,21'  Unlock D20, BOX and change deaths count to 21
  tboi-flash-save-editor serial.txt output.txt -b 'Satan,183' -b 'Monstro,2'  Write new save to output.txt and change kill counts for 2 bosses

Node JS library

import { SaveEditor } from 'tboi-flash-save-editor';

const editor = new SaveEditor();

// Sample save string (contains all secrets unlocked)
const mySaveString = `8368483363880242075421014404153202610417376862552834616636650562633468860349756683014106572909430714310164031636616134270769613568846142376481024374558202460516230842051539696356153569643326066369346703378686313982078436348378013336847702214336760522433686332640368683366830848736388004803532807400313380760021433666032240368683264836848336388084873538807450313280740021138676052143366603224036868326,0,0,0,896,14890,8734,105,565,13954,301,50242,0'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1,0'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1'1,0'513'693'426'551'375'455'341'410'302'0'0,1'1'1'1'1'1'1'0'0'0,1394,274`

editor.parse(mySaveString);
console.log(editor.getMomKillsCount()); // Output: 896

editor.setMomKillsCount(412);
console.log(editor.getMomKillsCount()); // Output: 412

Get Unlocked Secrets

console.log(editor.getSecretsUnlocked());
// Output: Array of unlocked secrets, such as:
// [
//   { name: 'Maggy', unlocked: true },
//   { name: 'Cain', unlocked: true },
//   { name: 'Judas', unlocked: true },
//   { name: 'The Womb Floors', unlocked: true },
//   { name: 'Horsemen Appear', unlocked: true },
//   { name: 'Cube of Meat', unlocked: true },
//   ...
// ]

Unlock or Lock Items and Secrets

// Unlock an item
editor.unlockItem('PHD');

// Lock an item
editor.lockItem('PHD');

// Unlock a secret
editor.unlockSecret('D20');

// Lock a secret
editor.lockSecret('D20');

Get a string for serial.txt

const newSaveString = editor.toString();
console.log(newSaveString);
// Output: A string formatted for serial.txt, such as:
// 8368483363880242075421014404153202610417376862552834616636650562633468860349756683014106572909430714310164031636616134270769613568846142376481024374558202460516230842051539696356153569643326066369346703378686313982078436348378013336847702214336760522433686332640368683366830848736388004803532807400313380760021433666032240368683264836848336388084873538807450313280740021138676052143366603224036868326,0,0,0,896,14890,8734,105,565,13954,301,50242,0'1'1'...

Scripts

• test - Runs tests using Jest
• build - Compiles TypeScript
• type - Checks TypeScript types

Resources

This project was inspired by Himsl Games's video, titled "Save Files Explained in The Binding of Isaac!" - a fantastic explanation of the game's save system.

Additionally, a big thank you to The Binding of Isaac Wiki for its detailed resources.

Contributing

Contributions are welcome! Feel free to open an issue or submit a pull request.

License

This project is licensed under the MIT License.