Every package downloaded for the load under way, in the order they became known - for one bar across all of them, rather than Sandbox.LoadingScreen.Progress's one download at a time. Packages known in advance (a server's, the game and its map) are added with their sizes before anything starts downloading; anything found later is added as it starts. Cleared when the loading screen's shown or hidden.

How far the whole game load is, 0 to 1, across all its stages - for a bar that keeps moving once the downloads are done. 1 once it's made it into the game, so the screen can finish its bar on the way out; null when no game is loading and the last one didn't make it, or a new screen's up before its load has begun.

A URL or filepath to show as the background image.

The game being loaded, once it's been looked up - so the loading screen can show its name, its art and what's new in it. Null before then, and when what's loading isn't a game. Cleared when the loading screen is hidden.

A snapshot of the current download's progress, or null when progress is unavailable. Cleared when the loading screen is hidden.

How far through the step in Sandbox.LoadingScreen.Title it is, 0 to 1, for a bar while nothing's downloading - like updating a package's shaders. Null when the step can't say. Cleared when the loading screen is hidden.

A subtitle to show

A list of tasks that are currently being awaited during loading.

A title to show