What about L4D1/2? Does the zombie apocalypse mean nothing to you, sir? But as quality as those games are (the first more than the second from what I hear), admittedly they aren't quite as halfy-lifey as some would like them to be...
But wait a minute?...Why am I even talking about those two games? Isn't there something that I'm forgetting?
Hmmm...oh yeah, Portal.
To say nothing of the fact that Portal is now being taught to aspiring educated
elitists,
http://www.geek.com/articles/games/portal-becomes-part-of-college-curriculum-20100824/, it is also one of the most incredible games I've ever played -- and did you see the latest video release?
http://www.joystiq.com/2010/08/24/portal-2-video-steven-merchant-debuts-as-wheatley/#continued ? The sequel is increasingly looking to be far more than just "more portal" i.e. more levels.
In other words, Valve be working hard. And if I have to wait a little for Portal 2, I will. Their track record speaks for itself.
Oh yeah, and Steam's pretty cool too.