 Gilbert's idea was warmly received, but production was postponed because Lucasfilm Games assigned its designers, including Gilbert, to "".Development of "The Last Crusade" was finished in 1989, which allowed Gilbert to begin production of "The Secret of Monkey Island", then known internally under the working title "Mutiny on Monkey Island".Gilbert soon realised that it would be difficult to design the game by himself; he decided to join forces with Tim Schafer and Dave Grossman, both of whom he hired for Lucasfilm.