So you got me curious, and I'm now looking at what the Steam store offers for free for Half-Life. But the thing is that I never played either the first or the second one, so I'm not sure what I should be getting. If I wanted to properly experience this series, which ones should I download, or in which order should I play them? The options are:

"Half-Life: Caged", "Half-Life: Restored", "Half-Life: Before", "Half-Life - The Freeman Chronicles"

At least, for Half-Life 2, it's more straightforward. The only options I can see are: "Half-Life 2: Downfall", and "Half-Life 2: Update". All the rest of the options seem to be soundtracks, demos or plungers. But the first one's options just make it confusing.

Edit: Oh. Seems that all of those were just "partial matches" and there was an "exact match" above that with the actual game. But that still confuses me a bit. Does it mean that everything I mentioned above are DLCs or patches?