This early version of Marathon was first shown at the San Francisco Macworld Expo in January 1994. Faster and more elegant than its predecessor, the game did not make a large impact at the time as many people perceived it as a slightly-enhanced Pathways Into Darkness. Following the Macworld showing, Bungie overhauled the game, which included a from-the-ground-up rewrite of its rendering engine. In its final public release, Marathon bore little resemblance to its early appearance.