The Star Wars films were not released in episode order. The Star Wars Trilogy was released first, starting with Star Wars: A New Hope (originally released as simply Star Wars) in 1977. The films included in the Star Wars Trilogy are listed below.
The original Star Wars trilogy was released as a "Special Edition" in the 1990s. The films contained new (and controversial) footage, as well as being remastered. Enjoy the Special Edition the old school way--VHS!