Core Assets are assets considered essential to your project. They and their references will be protected from the cleanup process. We will automatically determine the assets required by your packaged game but you can manually mark an asset or a folder.
Right now, the algorithm marks the following assets as Core Assets:
DirectoriesToAlwaysCook (recursively)MapsToCook sectionGameDefaultMap - map loaded on startup by the clientServerDefaultMap - map loaded on startup by the serverGlobalDefaultGameMode - GameMode used by the client if none was explicity set on the worldGlobalDefaultServerGameMode - GameMode used by the server if none was explicity set on the worldGameInstance - Manager spawned on both client & server to manage the running gameSelect the assets you want to mark and use the asset context menu to Mark as Core.
Select the folders you want to mark and use the folder context menu to Mark as Core.
You can view all the root Core Assets inside the Clean Project Dashboard.

You can view entries from Core Assets in the Settings page. Navigate to Project Settings → Out-of-the-Box Plugins → Clean Project and remove unwanted assets from Core Assets and Core Folders.
