Welcome, explorer, to Floydman's Save Swapper! You can use this tool to edit save files from Unreal Engine 4 games developed by Cyan: Obduction (2016), Myst (2020), and Firmament (2023).
This app was built using only HTML, JavaScript, and CSS and operates completely client-side within your browser, so your files are never sent anywhere, nor are they handled by anyone other than you. This means the editor is also portable, so you can download it and use it anywhere you have access to a modern browser whether or not you have access to the Internet.
Here's how it works: ⏵ (Click to show.)
  1. Fully pause or close the game whose save file you are editing.
  2. Locate the save file you want to edit (a single file that ends in ".sav"). On Windows, this should be at C:\Users\YOUR_USERNAME\AppData\Local\GAME_NAME\Saved\SaveGames (alternatively %LOCALAPPDATA%\GAME_NAME\Saved\SaveGames).
  3. Create a backup of your original save file, just in case. Put it somewhere else and/or change its name.
  4. Load the file into this editor by pressing the button.
  5. Edit away. Or don't. I'm not here to tell you what to do.
  6. Click the save button to download the edited version of your save file.
  7. Put the edited save file where the original was located. Make sure it has the same name as the original.
  8. Return to your game. Do not click "Resume". Instead, explicitly load the save file you edited.
  9. Watch that sweet, sweet infinite health and gold make you unstoppable.
Questions? Comments? Suggestions? You can find me on Reddit as IAmTheFloydman. I unashamedly adore receiving praise, so please send a "thank you" if you find this tool useful. Then I'll also know it's being used!
Other tools I've made are listed here.
This is fan-made software released with absolutely no promises, guarantees, or obligations. User assumes sole responsibility for any and all consequences and effects arising from use of this software. (Seriously, if an ambiguously-sentient space pinecone or definitely-lethal-from-that-height teleportation book crash through your roof, that's on you.) Myst, Obduction, Firmament, and Cyan are copyrighted by—and trademarks of—Cyan Worlds / Cyan, Inc. All rights reserved.
(may freeze your browser while loading)
UE4 version: Unknown
Save type: Unknown