As some of the other comments have noted, this is like a free-to-play weekend, but longer. It does not appear that you can associate it with your account for f

As some of the other comments have noted, this is like a free-to-play weekend, but longer. It does not appear that you can associate it with your account for free. I was surprised that I don't already own Half-Life on Steam. I have the Orange Box, but I guess I only have boxed copies of the older games and expansions.