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To install and update The Binding of Isaac: Repentance mods without Steam, you must use external tools to download Steam Workshop files and manually place them in the game's directory. 1. How to Download Mods Without Steam

Short answer:

You cannot use the Steam Workshop with a non-Steam version.
But you can manually install mods from sites like GitHub or Modding of Isaac, provided they are updated for Repentance.

Since you cannot browse the Workshop directly, these platforms host standalone versions of popular mods:

remains a primary repository for non-Steam modders. Note that some older mods here may not be fully compatible with the Repentance+ update. GitHub Repositories : Many major mods, such as the External Item Descriptions (EID) , maintain updated versions on

Here’s a concise, polished paragraph you can use:

  1. You bought Isaac on GOG or Epic: These storefronts do not have a Steam Workshop integration. You must manually install mods.
  2. You use a DRM-free copy: Humble Bundle or physical editions.
  3. Steam Workshop is down or restricted: Sometimes you want a mod that was deleted from the Workshop, or you play on a Steam Deck in offline mode with manual control.
  4. Version control: You need a specific, older version of a mod that isn’t auto-updated by Steam.