Buddy, if you thought the Orange Box was a bargain, have I got a deal for you. This is an excellent strategic move on Valve’s part, because consider the following: people who have not bought the Orange Box at this point likely have not because they’ve never even gotten started on the Valve Canon and are unlikely to spontaneously do so; it’s be like just deciding on a whim to read through Proust’s Remembrance of Things Past. Now, if they were to be bought the entire series for Christmas, say, they might just take a shot at it. And as I well know, “Once you go Black Mesa, you never go back, yessa.”
Seriously though, this is a pretty fat deal. If I didn’t already own everything on here, I’d be jumping on it right now. Every single game, people!