Later in 1995, "The Dig" was published. Production had started in 1989, however "The Dig" was plagued with development problems. The final version of the game was overseen by Sean Clark, although two previous versions had involved Noah Falstein, Brian Moriarty and Dave Grossman. The game's story itself was envisioned by Steven Spielberg, who had concluded that a film version would be prohibitively expensive. Spielberg's story focused on a group of astronauts becoming stranded on an alien world while on a mission to stop an asteroid hitting Earth. "The Dig" used the SCUMM engine and the INSANE technology. In addition, fellow Lucasfilm company Industrial Light & Magic was involved in the game's special effects. Michael Land composed the game's music, which included excerpts, many as short as one or two chords, from Richard Wagner's work.