Gorgo #18

Gigantic alien humanoid robots who plan on conquering worlds across the cosmos, launch an attack on Earth with their massive ships. They annihilate Los Angeles, Moscow, and Johannesburg to show Earthlings their power. After landing in Africa, they are attacked by Gorgo and defeat him by ensnaring him in cables. Gorgo puts out a call to his mother who arrives and helps him defeat the invaders causing them to retreat back into space.