Hollywood movies are increasingly thinking video games. “For studios, they represent a lucrative opportunity to introduce “catalog” products to a new generation of players and broaden a gaming universe that is already red hot. According to the NPD Group, a New York-based sales and marketing research firm, video-game software accounted for $7.3 billion in revenues in 2004, and sales rose 23% in the first quarter of this year. Games such as “Star Wars: Episode III Revenge of the Sith,” released last week, are developed in conjunction with the film. And recently the DVD world began cashing in too, offering simplified versions of video games as “extras” with films such as “Hulk” and “Van Helsing.”