Zeus revealed he was not raised by his father Kronos, and when they finally met, he was forced to kill him to save his siblings. He then fought with them in the ten-year war known as the Titanomachy.
Banding together with his fellow gods, Zeus defeated the last Titan. But as the last Titan fell, he swore a curse on the gods, and when his blood struck the sea, the Giants were born. These monsters were brought into the world for a single purpose: to destroy the realm of the gods. A hellish war known as the Gigantomachy then began. The gods swore to defeat the giants and rid them of the Earth. Both gods and giants fell alike. Still, neither side would relent, and the two factions battled endlessly, incapable of conquering the other. Until one day, Zeus convinced two of the giants to take up arms with the gods. Soon, Zeus would lead one final attack. Zeus ordered Hermes to gather their souls while their remains were cast into the ocean to be forever swallowed by the tides. The smith of the gods, Hephaestus, forged the grand automaton Talos to stand guard over the cauldron, forever sworn to keep it shut so that this evil would never return. After the defeat of the giants, a new threat risen. The giant monster Typhon, stronger than every titan or giant before. It took the combined powers of all the Gods to finally defeat the beast. But they still couldn't kill it so they trapped it under mount Etna with the help of the witch goddess Hecate which created the Eleusinian Stone. Then they used the stone to divide the world to rule. Zeus got the Heavens and became king of the gods, Poseidon got the ocean and Hades got the Underworld.