IMDB
This is probably the best of Ruggerro Deodato's films. Starring Christopher Connelly, Tony King, Ivan Rassimov, and George Hilton, this post-apocalyptic thriller revolves around Mike (Connelly) and Washington (King), two Vietnam vets, who find themselves muddled up in a battle between good and the dark face of Atlantean evil.

When a team of scientists, led by Professor Peter Saunders (Hilton), attempt to raise a sunken Russian submarine off the coast of Miami, an ancient Atlantean tablet is recovered from the ocean floor. They call in Dr. Cathy Rollins, and expert in pre-Columbian dialects, to examine the artifact. During the attempt to bring up the sub, a tidal wave destroys the platform and leaves only a tiny group of survivors, including Saunders, Rollins, and Bill Cook (Ivan Rassimov). They are rescued by Mike and Washington, and after cruising around aimlessly for a day, hit an island off the Florida coastline. On going ashore, they find everything and anything has been destroyed, and a string of bodies have been left amongst the ruins. Coming face-to-face with the culprits, a viscous mob of Atlantean killers, led by their leader "Crystal Skull", Mike and the gang must find a way to escape before they too are added to the growing list of victims.

There is so much that makes this movie the classic that it is. Superb acting, an interesting if not exciting storyline, and brilliant effects combine to create this hard-to-find classic. Wonderful and often hilarious use of action scenes, including the gruesome decapitation of a motorcycle raider, and a hapless woman being shot in the throat with a dart. Also featuring an excellent soundtrack, this movie is a must-see for post-apocalyptic fans and even those who simply enjoy a great action flick.