Script writing is the art of writing scripts for various media like films, TV, and video games. Screenwriters are responsible for researching stories, developing narratives, and writing screenplays in the required format. They are commissioned by producers to adapt concepts, true stories, or literary works into screenplays. Video game writers also create characters, scenarios, and dialogue while working closely with other game designers. Effective scripts follow classic story structures like the three-act structure and the hero's journey archetype described by Joseph Campbell. Dialogue is especially important for films to convey characters and plots visually rather than through written words. In the US, completed works are copyrighted but ideas and plots are not.