How to get the original binding of Isaac OST in Rebirth / Afterbirth

You can’t literally revert Rebirth /Afterbirth to the 2010 “original Isaac” soundtracks, because those games use completely new music by Ridiculon (Matthias Bossi & Jon Evans). What you can do is:

  • Play the classic 2010 OST separately (outside the game).
  • Use a mod that replaces or mixes in the classic tracks while keeping Rebirth/Afterbirth intact.
  • Buy the official soundtracks from Steam, Bandcamp, etc.

1. The short answer

  • In-game: There is no official switch to “original Isaac music” in Rebirth/Afterbirth. The soundtrack is intentionally new.
  • Closest in-game option: Install a “classic music” mod that swaps tracks with the original 2010 soundtrack or blends them.
  • Outside the game: Download or buy the original OST separately and listen to it whenever you want.

2. Getting the original 2010 soundtrack

Official sources

You can legally get the original The Binding of Isaac (2010) soundtrack from:

  • Steam / Humble Store / official sites
    Search for:

“The Binding of Isaac Original Soundtrack”
This is by Caveodev (the original dev) and often listed as a separate purchase or included with certain bundles.

  • Bandcamp / music platforms
    Some editions of the original OST have been sold on Bandcamp or appear on services like Spotify, Apple Music, etc. Search:

“The Binding of Isaac original soundtrack”
and verify it’s the 2010 version, not the Rebirth/Afterbirth one.

Unofficial / archive sources

If you already own the game and just want the files:

  • Many fans have ripped the original Isaac music from the 2010 executable or distribution and posted MP3/OGG collections on sites like:
    • Khinsider and similar game music archives
      Search:

“The Binding of Isaac 2010 OST”
You’ll often find “gamerip” packs with all tracks.

These are fine for personal listening, but check local copyright rules if you plan to redistribute.

3. Using the original music inside Rebirth/Afterbirth

Option A: Classic music mod (Rebirth + Afterbirth only)

On the older Rebirth/Afterbirth versions (not Afterbirth+ / Repentance), modding is done via moddingofisaac.com , not the Steam Workshop.

A mod that matches your request is:

  • Pure Classic Music Mod
    Link mentioned in forums:

https://moddingofisaac.com/mod/91/pure-classic-music-mod

This mod is designed to:

  • Replace or mix the original 2010 tracks with Rebirth/Afterbirth’s music.
  • Keep your game installation intact (no deletion of files).

How to install (general steps):

  1. Go to moddingofisaac.com.
  2. Find the mod page for “Pure Classic Music Mod”.
  3. Download the mod zip.
  4. In your Isaac folder, open:
    • mods/ (create if it doesn’t exist).
  5. Extract the mod into mods/ so you have something like:
    • mods/PureClassicMusicMod/ with init.lua, music files, etc.
  6. Launch The Binding of Isaac: Rebirth.
  7. In the game’s mod menu, enable the classic music mod.

Exact folder paths and enabling steps can vary slightly; the mod page’s help section usually has a short guide.

Note: These mods are generally not compatible with Afterbirth+ / Repentance, which use the newer Steam Workshop mod system.

Option B: Manual file replacement (advanced, risky)

Some players manually replace music files in Rebirth/Afterbirth’s music/ folder with the original Isaac tracks. This is:

  • Not officially supported.
  • Risky: can break updates or cause missing/crashing audio.
  • Harder to manage across patches.

If you still want to try:

  1. Back up the entire game folder.
  2. Locate the music directory (often under:
    • The Binding of Isaac Rebirth/music/ or similar).
  3. Replace files with the original 2010 tracks, keeping filenames consistent.
  4. Test the game.

This method is more fragile and harder to maintain than a mod, so it’s usually better to use a mod if available.

4. Getting the Rebirth / Afterbirth OSTs (new music)

If you also want the new soundtracks:

  • Steam Soundtrack DLC
    • The Binding of Isaac: Rebirth – Soundtrack includes:
      • All Rebirth music
      • All tracks added in Afterbirth , Afterbirth+ , and Repentance.
* The _Afterbirth_ OST is a **free download** on Steam if you own both:
  * “The Binding of Isaac: Rebirth – Soundtrack” DLC
  * “The Binding of Isaac: Afterbirth” DLC.
  • Bandcamp / other stores
    Search:

“The Binding of Isaac Afterbirth OST Ridiculon”
You’ll find:

* _Afterbirth_ original soundtrack (2015).

* _Afterbirth+_ original soundtrack (2017).

These are high-quality MP3/FLAC versions, often with alternative track names matching in-game locations.

5. Quick checklist

If your goal is “original binding of Isaac music in Rebirth/Afterbirth” :

  1. Just listen to the classic OST:
    • Buy/download the 2010 soundtrack and play it externally.
  2. Want it in-game (Rebirth + Afterbirth only):
    • Install the Pure Classic Music Mod via moddingofisaac.com.
  1. Want both old and new:
    • Use a classic mod in Rebirth/Afterbirth
    • And keep the official Rebirth/Afterbirth OSTs on your music player.

Information gathered from public forums or data available on the internet and portrayed here.