Key features include:
Disclaimer: Turn off Steam Cloud sync temporarily before doing this. Steam will overwrite your manual edits if you don't. The Binding Of Isaac Repentance Save Editor
Whether you're a seasoned player looking to unlock new content or a newcomer wanting to experience the game in a new way, The Binding of Isaac: Repentance Save Editor is definitely worth exploring. Just remember to use it responsibly and at your own risk. Key features include: Disclaimer: Turn off Steam Cloud
This cannot be stressed enough. Before any modification, copy the rep_persistentgamedata1.dat file to your Desktop or a separate backup folder. If the editor crashes or you toggle the wrong option, a backup ensures you don't lose everything. The Binding Of Isaac Repentance Save Editor