Plenty of alien invasion movies have become box office hits and certified classics, but here are some forgotten alien invasion movies that still hold up today.

Steven Spielberg’s fourth film about alien encounters is “Disclosure Day,” following “ET: The Extra-Terrestrial,” “War of the Worlds,” and “Close Encounters of the Third Kind.” That inspired us to take another look at what Roger Ebert thought about some of the most famous and infamous alien movies,

Add Yahoo as a preferred source to see more of our stories on Google. Some of the greatest sci-fi movies of all time revolve around humans in a desperate struggle for survival. Sometimes we’re fighting time-traveling robots or out-of-control plagues.

Steven Spielberg knows aliens. Though he hasn't made as many UFO-centric movies as you might assume (he's made more movies about WWII than he has about extraterrestrials), the director behind Close Encounters and E.T. clearly knows how to tell a ...