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The Binding of Isaac Save File Location

Last verified: 2026-10-08

Save file location (Windows (Steam) — Repentance+): %USERPROFILE%\Documents\My Games\Binding of Isaac Repentance+

Quick answer: On PC, the current edition (Repentance+) stores saves at C:\Users\<you>\Documents\My Games\Binding of Isaac Repentance+\ , as persistentgamedata1.dat, persistentgamedata2.dat and persistentgamedata3.dat (the number is the save slot). The fastest route is Win+R, paste %USERPROFILE%\Documents\My Games\Binding of Isaac Repentance+ and press Enter. Older editions use the matching folder name (Afterbirth+, Rebirth). Steam Cloud is on by default, so the live copy may also sit in Steam\userdata\<id>\250900\remote as rep+persistentgamedata1.dat. Copy the whole folder (including the save_backups subfolder) to back everything up.
Windows (Steam) — Repentance+
%USERPROFILE%\Documents\My Games\Binding of Isaac Repentance+
Older editions (Afterbirth+ / Rebirth)
%USERPROFILE%\Documents\My Games\Binding of Isaac Afterbirth+
Steam Cloud copy
Steam\userdata\<AccountID>\250900\remote

The Binding of Isaac keeps its unlock/progress saves in Documents under My Games, with a separate .dat file per save slot — and because Steam Cloud is on by default, a wiped run is usually a cloud conflict, not a lost file. Here is the exact PC path, how to open it, and how to back it up.

Save file locations

Windows (Steam) — Repentance+
%USERPROFILE%\Documents\My Games\Binding of Isaac Repentance+

Full default: C:\Users\<you>\Documents\My Games\Binding of Isaac Repentance+\ . Files are persistentgamedata1/2/3.dat (one per slot). A save_backups subfolder here holds dated auto-backups (YYYYMMDD.rep+persistentgamedata1.dat).

Older editions (Afterbirth+ / Rebirth)
%USERPROFILE%\Documents\My Games\Binding of Isaac Afterbirth+

Same Documents\My Games tree, folder named for your edition. Rebirth uses 'Binding of Isaac Rebirth'. Check which edition you launch if the Repentance+ folder is empty.

Steam Cloud copy
Steam\userdata\<AccountID>\250900\remote

With Steam Cloud on (default), the live save mirrors here as rep+persistentgamedata1.dat. A corrupted local file can overwrite the good cloud copy on launch, so keep a manual backup.

Cloud saves

The Binding of Isaac syncs via Steam Cloud by default, so your save exists both in Documents\My Games and in Steam\userdata. Because a half-written or reset .dat can overwrite the good cloud copy the next time you launch, a manual copy of the Repentance+ folder is your real backup — the game also keeps dated auto-backups in its own save_backups subfolder.

Cloud save conflict & platform recovery

Common loss: unlocks or a run 'reset to zero' after a crash or on a second PC — almost always Steam Cloud syncing an older persistentgamedata.dat over your good one.

  1. Check the save_backups subfolder inside Binding of Isaac Repentance+ first — the game keeps dated copies you can restore.
  2. Before relaunching after a crash, copy the whole Repentance+ folder somewhere safe.
  3. If the cloud rolled progress back, disable Steam Cloud for the game (or go offline), restore a good persistentgamedataN.dat, launch once to confirm, then re-enable cloud.
Back up first (Windows) — copy & run

How to open the save folder

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Save problems & fixes

FAQ

Where is The Binding of Isaac save file on PC?

In C:\Users\<you>\Documents\My Games\Binding of Isaac Repentance+\ as persistentgamedata1/2/3.dat. Open it with %USERPROFILE%\Documents\My Games\Binding of Isaac Repentance+.

Which file is my Binding of Isaac save?

persistentgamedataN.dat, where N is the save slot (1, 2 or 3). It holds that slot's progress and unlocks.

Why did my Isaac unlocks reset?

Usually a Steam Cloud conflict overwrote your good file. Check the save_backups subfolder for a dated copy, or restore from cloud/backup launched offline.

Does The Binding of Isaac use Steam Cloud?

Yes, by default — the save also lives in Steam\userdata\<id>\250900\remote, so keep a manual backup to avoid cloud overwrites.

Other games

Need another game or a quick backup? Use the Save Location Finder — pick any game to get its exact save path plus a ready-to-run backup command.