How Swarm Simulator Saves Your Game Progress

Updated

Swarm Simulator saves your progress in your browser's local storage (and cookies), so the save lives on your device rather than on a server account. If your browser blocks third-party cookies or local storage for the site, the game can fail to save or load. When a load fails, the error screen shows your saved game data so you can copy it and import it later through the options screen.

Where the save actually lives

The game's own error messages describe the mechanism directly:

  • It needs permission to "set cookies/localstorage in your browser."
  • It states plainly that it "needs this storage to save your game."

That means there is no visible cloud account or login step in the provided material. Your swarm's state is tied to the browser and device you play on. Clearing site data, using a different browser, or playing in a private window that discards storage can therefore cost you progress.

When saving or loading fails

The page includes several distinct error dialogs, and each points to a different cause:

What you see Likely cause What to do
"Problem loading your saved game… make sure [domain] has permission to set cookies/localstorage" Browser is blocking third-party cookies or site storage Allow cookies/local storage for the site, then reload
"Problem loading your saved game. This is a bug." with your save data shown A game-side bug while reading the save Copy the displayed data and keep it; import it once the bug is fixed
"Problem saving your game" with the data it tried to save Save write failed Copy the data and import it through the options screen

The common thread: the error screen is your backup. Both the load-failure and save-failure dialogs display the raw save data and tell you to keep it. Copy that text somewhere safe before closing the dialog.

Recovering progress by importing

The save-failure message says the data "can be imported through the options screen." The load-failure message says that "once the bug is fixed, you can import this to restore your game." So the recovery path is:

  1. Copy the save data shown in the error dialog.
  2. Store it outside the browser (a text file or note).
  3. Open the game's options screen and use the import function to restore it.

The provided material does not describe the exact import field or button layout, so treat the options screen as the place to look rather than expecting a specific menu path.

Browser support and storage quirks

The site states that Swarm Simulator does not support Safari and suggests Chrome or Firefox if you have trouble. That matters for saving because Safari's cookie and storage handling is a frequent source of the "third-party cookies" error above. If saves keep failing, switching to a supported browser is the first thing to try.

Practical habits that protect your swarm

  • Play in a normal (non-private) window so storage persists.
  • Don't clear cookies or site data for the game's domain.
  • After any save or load error, copy the displayed data before dismissing the dialog.
  • Keep one recent copy of your save data as insurance before long sessions.

One more thing worth knowing: the page contains an April Fools notice about renaming the game to "Kitten Klicker" and requiring graphics. It is a joke, and the page itself offers a link to remove the extra styling later via the options screen. It does not change how saves work.