Zak McKracken and the Alien Mindbenders

I never see this talked about as much as the other LucasArts classics, and I can't imagine why. The subject matter and theming are terrific, the writing is witty and fun, and the puzzles are pretty satisfying. Aside from a couple hiccups (repairing the crystal and making your own spacesuit come to mind), every puzzle felt pretty intuitive. Even if it's not always clear how a certain action will become useful later on, you can find most of what you need just by messing around with item interactions in ways that seem organic. Plus the tabloid feelie that comes with the game is a riot. I'd love to have a physical copy.