[PC] Adventure games, anyone?

Definitely play the Gabriel Knight games. And in order.

King's Quest always struck me as hit-or-miss. The best ones are probably parts 3 and 6. Space Quest is good, but I love it more for the humor than the puzzles and gameplay. Pretty much every adventure game from Lucasarts deserves your attention.

There's the Tex Murphy games. I've only played Under a Killing Moon and The Pandora Directive, and they're great adventure games, despite being billed as "interactive movies." Contrary to what that might suggest, there's a huge chunk of challenging gameplay to be found here.

You should also try The Last Express, if you can find it. It's different from the usual adventure game in that it runs in real time and that it's impossible to see all the events in one playthrough (you obviously can't be in two places at once), but it's still an immersive experience that I would like to have seen in more adventures from its time.

Jam it back in, in the dark.