Obduction, despite how cosmic the word sounds, does not refer to flying saucers. More terrestrial than extraterrestrial, obduction means when one oceanic tectonic plate heaves up and laps over a continental plate. One world eclipsing another. Imagine the confusion you’d feel if you one day woke up underwater. Myst (1993) began with Atrus (one of the series’ central curators, played by co-creator Rand Miller) falling out of his world. An iconic frame—prime enough for the box art—of a free-fall silhouette descending from a rift into a starry unknown. In a similar setup, Obduction begins with the world falling on to…