The Binding Of Isaac Repentance Save Editor May 2026

Name: Isaac Save Editor (by tterb / updated for Repentance)
Download source: GitHub or Speedrun.com resources (avoid random .exe files from untrusted sites).
Platform: Windows (requires .NET Framework 4.7.2 or higher).
File format: Reads repentance.dat and persistentgamedata1.dat.

⚠️ Note: The official save file location after Repentance is:
C:\Users\[YourUserName]\Documents\My Games\Binding of Isaac Repentance\

Editing old saves can accidentally unlock "Co-op Babies" (removed in Repentance). This causes a crash. Ensure your editor has a "Remove obsolete data" button.

Start Isaac. If you edited Steam achievements, the game will resync them on launch. The Binding Of Isaac Repentance Save Editor

Let’s walk through the most common scenario: You lost your save and want to re-unlock "Godhead" (The Lost’s hardest unlock) without redoing the 300 hours.

Disclaimer: Turn off Steam Cloud sync temporarily before doing this. Steam will overwrite your manual edits if you don't.

Step 1: Locate your Save File.

Step 2: Backup. Copy repentance.save to your desktop. Rename it repentance_backup.save. Never edit the only copy.

Step 3: Open the Web Editor. Navigate to the Hypnoot Repentance Save Editor (found on GitHub or modding communities like r/themoddingofisaac).

Step 4: Load & Edit.

Step 5: Save & Inject. Click "Export Save" or "Download." Replace the original repentance.save in your game folder. Launch the game. If done correctly, you’ll see the achievement notification fire immediately upon booting.

A save editor is a third-party software program that reads your repentance.save or save_X.dat files, decodes the binary or XML data, and presents it to you as a user-friendly checklist. Instead of playing the game for 50 hours to unlock The Forgotten, you simply open the editor, tick a box, and hit save.