PlayerPrefs and registry settings

Unity stores the observed Windows PlayerPrefs values under the current user. Treat them as serialized preferences for this build, not as a stable configuration API.

Observed registry location

HKEY_CURRENT_USER\Software\Enhearten Media PTY\Sanctuary

Confirmed keys

settings.uiScaling: Overrides the JSON UI scale during startup; SaveUIScaling writes the same key.
client.hostIpaddress: Stores the client host address.
client.hostPort: Stores the client host port.
host.listenPort: Stores the host listen port.
SelectedMapPath: Stores the selected map path.

Test procedure

Export the Sanctuary registry key.
Change one value and record its original type and data.
Restart the game and check the visible result.
Restore the exported key if the result is wrong.

Do not assume that an unexplained value is safe or still used by the current build.