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Game Hub / Save Reference

Oxygen Not Included Save Files & Tools

Oxygen Not Included PC save location, backup, file-format, launcher, cloud-sync, and compatibility reference. This Game Hub documents save-file facts without implying that a game-specific Save Editor is available.

PC

01 / Overview

Save reference at a glance.

Game Hubs separate documented save-file facts from actual Tool support. A Game Hub can be useful even when no custom editor exists.

Developer
Klei Entertainment
Publisher
Klei Entertainment
Platforms
PC
Save extensions
.sav

Oxygen Not Included can keep local and Steam-cloud colony files in neighboring but different Documents directories. That makes backup deceptively easy: copying only save_files may miss the actively synchronized colony, while copying only cloud_save_files may omit a local-only game. SaveEditor recommends preserving both trees before changing cloud settings and using timestamps plus the game build/DLC context to decide which copy is authoritative. This is safer than assuming the copy with the most familiar folder name is the newest.

For this PC reference, the documented storage is Windows: Local: %USERPROFILE%DocumentsKleiOxygenNotIncludedsave_files ; Steam cloud: %USERPROFILE%DocumentsKleiOxygenNotIncludedcloud_save_files<user-id>. The known file or folder pattern is Colony save files beneath save_files or the Steam cloud_save_files account directory.. Oxygen Not Included distinguishes local save_files from Steam cloud_save_files. Both live below the Klei Documents tree, so the active copy can depend on whether cloud saving is enabled for that colony.

Backup guidance: Back up both save_files and the relevant cloud_save_files user directory before changing cloud settings or moving a long-running colony. Label the copy with game build/DLC branch. Steam Cloud and Epic cloud are documented; OneDrive can also synchronize Documents if enabled. Launcher and cloud context matters because Do not assume save_files is the active source when Steam cloud is enabled; the user-specific cloud_save_files directory may contain the copy being synchronized.

Compatibility and recovery should stay conservative. Save compatibility can depend on game updates and DLC branch. A local and cloud copy with the same colony name can represent different timestamps. If the expected progress is not visible, If a restored colony is replaced, compare local versus cloud timestamps and resolve Steam/OneDrive synchronization before launching again. Avoid repeatedly overwriting both trees at once. SaveEditor.com only labels a game-specific editor as available when a separate linked Tool has a verified operational runtime; this reference page by itself is not an editor claim.

Compatibility note

Save compatibility can depend on game updates and DLC branch. A local and cloud copy with the same colony name can represent different timestamps.

02 / Save locations

Where the save files are stored.

Paths are displayed only when they have been explicitly documented for this Game Hub. Environment variables and launcher-specific differences should remain visible instead of being silently normalized.

Windows
Local: %USERPROFILE%DocumentsKleiOxygenNotIncludedsave_files ; Steam cloud: %USERPROFILE%DocumentsKleiOxygenNotIncludedcloud_save_files<user-id>

Launcher / edition differences

Do not assume save_files is the active source when Steam cloud is enabled; the user-specific cloud_save_files directory may contain the copy being synchronized.

03 / File format

Files, extensions, and format notes.

This section documents only known file names and structures. Format notes can later connect directly to SaveEditor.com parsers, checksum engines, and converters.

Extensions

.sav

File names / patterns

  • Colony save files beneath save_files or the Steam cloud_save_files account directory.

Format notes

Oxygen Not Included distinguishes local save_files from Steam cloud_save_files. Both live below the Klei Documents tree, so the active copy can depend on whether cloud saving is enabled for that colony.

Launchers / stores

Steam / Epic Games Launcher

Cloud save notes

Steam Cloud and Epic cloud are documented; OneDrive can also synchronize Documents if enabled.

04 / Tools

Actual linked Tool support.

No verified game-specific Save Editor is currently listed. This Game Hub remains useful for save locations, file details, backup guidance, and other linked utilities.

No active game-specific Tool is currently listed.

Planned and deprecated Tool records are intentionally excluded. The save-reference information on this page remains separate from Tool availability.

Browse all tools

05 / Backup

Protect the original before editing.

Save editing should be reversible. Keep an untouched copy outside the active save directory before replacing, converting, repairing, or modifying a save.

  1. 01
    Close the game.

    Avoid modifying a save while the game or launcher may still be writing to it.

  2. 02
    Copy the entire relevant save set.

    Some games use multiple files, profile folders, metadata, or companion files rather than one isolated save.

  3. 03
    Store the backup elsewhere.

    Use a separate folder or archive so cloud sync or the game cannot overwrite the untouched backup.

  4. 04
    Edit a copy, then validate.

    Follow the exact compatibility and processing notes on the Tool page before replacing the active save.

Game-specific backup note

Back up both save_files and the relevant cloud_save_files user directory before changing cloud settings or moving a long-running colony. Label the copy with game build/DLC branch.

06 / Troubleshooting

When a save is missing or rejected.

Start with reversible checks. Do not delete or overwrite the only copy while diagnosing a path, cloud-sync, version, or format problem.

Game-specific notes

If a restored colony is replaced, compare local versus cloud timestamps and resolve Steam/OneDrive synchronization before launching again. Avoid repeatedly overwriting both trees at once.

A

Confirm the correct profile.

Games, launchers, and operating systems may keep separate save folders for different users, editions, or profiles.

B

Check cloud synchronization.

A cloud service can restore an older file or overwrite a local change. Preserve both copies before resolving a conflict.

C

Check Tool compatibility.

A matching filename does not prove a matching format. Verify platform, game version, extension, and Tool support state.

D

Restore the untouched backup.

If the game rejects a modified save, return to the original backup before attempting another change.

07 / FAQ

Oxygen Not Included save-file questions.

Answers are generated only from visible Game Hub metadata and actual linked Tool states, plus universal backup guidance.

Where are Oxygen Not Included save files stored?

The currently documented save locations are listed in the Save locations section above. Use the location that matches your platform or environment.

What save-file extension does Oxygen Not Included use?

The extensions currently documented on this page are: .sav.

Does SaveEditor.com have a verified Oxygen Not Included Save Editor?

No verified game-specific Save Editor is currently listed. This Game Hub remains useful for save locations, file details, backup guidance, and other linked utilities.

Should I back up the save before using a Tool?

Yes. Keep an untouched copy outside the active save directory before modifying or converting the file. Some games use multiple companion files, so back up the relevant save folder when in doubt.

Are there cloud-save considerations for Oxygen Not Included?

Steam Cloud and Epic cloud are documented; OneDrive can also synchronize Documents if enabled.

Editorial review

Game-specific metadata on this hub was last reviewed on 2026-08-08. Individual Tool pages maintain their own verification dates and compatibility notes.

Verification notes

Reviewed against current PCGamingWiki Oxygen Not Included save-location/cloud documentation.

Reference sources
  1. Reference 1 - www.pcgamingwiki.com

Related guides

Continue with reviewed save-file guidance.

Only reviewed, index-ready Guides explicitly related to this Game Hub are surfaced here.