If you had taken the time to check, you would have noticed that this update history is exactly the same as anyone else with a so-called "legit" copy. Just right-click on HL2 in the steam menu and click on
View update news. Nothing wrong there.
Weird, looks like a pirated game to me!
Valve/Half-life 2/HL2/CFG pretty much gives it away.
Steam\SteamApps\Account name\half-life 2\hl2\cfg should be the correct path.
No hard feelings!
No, actually, there are no steam equivalent.
It's the "bronze" version with half-life: source and a t-shirt.
http://www.halflife2.net/page.php?p=steam_purchase