20 Million Miles to Earth (1957)

 

One of Ray HarryHausen’s creature features, this tells the story of a trip to Venus goes horribly wrong. The astronauts crash land off the coast of Sicily and on board is a small alien creature. Our atmosphere soon makes the creature to grow gigantic and he goes on a rampage throughout Italy and must be stopped. A fun fact: HarryHausen reused the model for the 1981 movie Clash of the Titans. 

    

War Games (1983)

In this scientific romp, the government builds a supercomputer to control all their military operations. Thinking that he is hacking into a new game system, teenager David, accidently starts a nuclear war and has to stop the computer before things get out of control. A fun movie even if the tech is outdated at this point.