1) Jaws (1975)
Jaws TRAILER
2) E.T. (original: 1982)
E.T. TRAILER
3) Indiana Jones: Raiders of the Lost Ark
Indiana Jones TRAILER
4) Jurassic Park
Jurassic Park TRAILER
5) War of the Worlds
War of the Worlds TRAILER
And to round things up... here's a link to Spielberg's filmography (list of movies he has directed, produced or written):
Filmography LINK
