點解叫 Die Hard 4.0 而唔係就咁叫 Die Hard 4？

因為套戲大部份係有關電腦，所以叫 4.0，好似軟件名咁。

Willis said in 2005 that the film would be called Die Hard 4.0, as it revolves around computers. IGN later reported the film was to be called Die Hard: Reset instead. 20th Century Fox later announced the title as Live Free or Die Hard and set a release date of June 29, 2007 with filming to begin in September 2006. The title is based on the state motto of New Hampshire, "Live Free or Die," which is attributed to a quote from General John Stark. International trailers use the Die Hard 4.0 title,as the film was released outside America with that title.