Campaign (8), then Save, keeps up to five campaigns in slots. When you save over a slot, its old save is kept as a .bak file. The game asks you to save before quitting, loading or starting a new game.

The game also saves itself at the end of every month, in autosave.sav (the one before is kept as autosave.sav.bak), and Continue on the title screen picks up from there. The autosave is removed when the campaign is won or lost.

Saves are kept in %LOCALAPPDATA%\Sengoku - Road to Unification\saves on Windows and ~/.config/Sengoku - Road to Unification/saves/ on Linux. They are left alone when you upgrade or uninstall. Save files end in .sav.

The same five slots, each with a backup of its previous save. The browser edition also saves itself at the end of every month, and Continue on the title screen picks up from there. Saves are kept in the browser's own storage on your computer. They are not on the server, so they stay on that computer and that browser. Clearing the browser's site data deletes them.

Multi-player games are kept on the server, not in your browser: see Multi-player games.

Both editions can keep a campaign in a file of its own:

• Export to a file (6 in the Save list, Campaign > Save) saves the campaign to a file, named like sengoku-oda-1560-04.sav. In the browser it is downloaded; on the desktop you choose where it goes. Exporting does not count as saving to a slot.
• Import from a file (6 in the Load list, Campaign > Load or Load campaign on the title screen) opens a save file and plays it. If you have unsaved changes, the game asks first.

The file is the same in both editions, so this is how a campaign moves between the browser and the desktop. In the browser, Export is also the way to keep a copy that survives clearing the browser's data. Slot saves and .bak files can be imported too.

Both editions write save format 3, which can hold several human clans for multi-player games. Saves in the earlier formats 1 and 2 still open, and are updated when the game next saves. Desktop builds from before 1.1.0 cannot open format 3 saves.