The overall Terminator movie franchise has a mixed track record among fans. Most moviegoers agree that 1984's The Terminator is a sci-fi classic with cool ideas and suspenseful writing, and its 1991 sequel Terminator 2: Judgment Day became one of the best action movies of all time. Then, in the eyes of many fans and critics, the franchise's quality slipped with the next four movies, including 2008's Terminator Salvation.
Source：https://www.cbr.com/terminator-salvation-better-than-fans-think/
