Good games?

Now that I have my fancy schmancy gaming laptop which SERIOUSLY kicks all kinds of ass, does anyone know of good PC games? I tend to like a good shooter or puzzle game. By puzzle I do NOT mean the arcade style bejeweled type game. I mean like the last Penumbra or the Portal games. I have TF2 and Half-life already (both the first and second ones plus episodes one and two of the second game) and am most likely going to get Amnesia: The Dark Descent (and shit my pants in fear). Scary games are good, but I'd prefer creepy/eerie to shitloads of pop scares. Survival horror is fine (meaning no weapons) but it has to have a decent story. Actually, any game should have some kind of story, otherwise I probably won't like getting invested in it.

Anyway, there's a lot of stuff I've been meaning to play that I just haven't, so throw out anything you know/think is good or have at least heard a lot of people like.