Games with isometric graphics—a slightly rotated view with a top-down perspective—were a big deal several years ago. Static, isometric maps, mostly used in strategy and role-playing games, allowed the developers to create spectacular, detailed visuals, and most of them have aged really well.
GoG's running a huge sale on retro Activision titles this weekend. I'd recommend picking up at least Arcanum.
Sierra might have closed down, but the company's legacy lives on, as an agreement with parent company Activision brings classic titles Gabriel Knight and Arcanum to DRM-free PC game store Good Old Games.