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Atomfall Save File Location

Quick answer: On PC (Steam), Atomfall save files are stored in %LOCALAPPDATA%\Atomfall\PC_ProfileSaves\<user-id>\. Copy that folder to back up your exploration of the Quarantine Zone before updating or moving to a new PC.

Here's exactly where Atomfall keeps your save files on PC, how to open the folder, and how to back it up before an update or a new PC.

Save file locations

Windows (Steam)
%LOCALAPPDATA%\Atomfall\PC_ProfileSaves\<user-id>

Full path: C:\Users\<YourName>\AppData\Local\Atomfall\PC_ProfileSaves\<user-id>\ . AppData\Local is hidden — paste %LOCALAPPDATA% into the Run box.

Windows (Microsoft Store / Game Pass)
%LOCALAPPDATA%\Packages\Rebellion.Windscale_2vbwqmt31j4mr\SystemAppData\wgs

The Game Pass build stores saves in its package folder (codename 'Windscale') under AppData\Local\Packages in an opaque wgs container, not in PC_ProfileSaves.

Xbox Series X|S
My games & apps > Atomfall > Manage game > Saved data

Xbox saves sync to the cloud with your Microsoft account; there is no user-accessible save file on disk.

Cloud saves

On Steam Atomfall uses Steam Cloud, so PC_ProfileSaves syncs across machines on the same account. Close the game before restoring a backup so Steam Cloud doesn't overwrite your restored save with the older online copy on the next launch.

How to open the save folder

  1. Press Win + R to open the Run box.
  2. Paste the folder path shown above (for example %LOCALAPPDATA% or %APPDATA%) and press Enter.
  3. Open the Atomfall save folder to find your save data.
  4. Copy the whole save folder somewhere safe before editing, modding, or moving PCs.

Save problems & fixes

Cloud save overwrote my newer local save (or vice-versa)

This happens when the cloud syncs on launch before you restore a backup. Fully quit Atomfall, disable cloud saves for it (Steam: right-click > Properties > General), copy your good save into the save folder above, launch once to confirm it loads, then re-enable cloud so it uploads the correct copy.

Save is missing, won't load, or shows as corrupted

Verify the game files first, then look in the save folder for a backup or older copy (many games keep a .bak or a numbered rolling backup next to the live save). Copy that older file over the broken one while the game is closed. Never edit a save with the game running — that is the most common cause of corruption.

FAQ

Where is the Atomfall save file on PC?

On Steam it's at %LOCALAPPDATA%\Atomfall\PC_ProfileSaves\<user-id>. Press Win+R and paste the environment-variable path (e.g. %LOCALAPPDATA% or %APPDATA%) to open the folder.

How do I back up my Atomfall save?

Copy the whole save folder shown above to a safe location, then paste it back to restore. Close the game first so cloud sync doesn't overwrite it.

Does the Steam and Game Pass / console version share saves?

No. Different stores (Steam, Epic, Microsoft Store, consoles) keep Atomfall saves in separate folders or sealed cloud containers, so progress does not transfer automatically between them.

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.