The Olympian gods
In the beginning there was only Chaos, until the Earth was born with the mountains and the sea and then the Sky (Uranus) along with the sun, the moon and the stars. Later Uranus and Earth came together and gave birth to the Titans.
Uranus was scared that one of his children would take over his throne, so he enclosed each one of them in the depths of the Earth. But his son, Cronus, the strongest of the Titans, defeated him and became the world leader. He married Rhea, who gave birth to two gods and three goddesses: Hades, Poseidon, Zeus, Hera, Hestia and Demeter.
Cronus inherited the same fear as his father, that one of his offspring would take over his throne. So, when they were born, he swallowed them. However, Rhea, who was expecting Zeus, secretly gave birth in a cave, in Crete, and hid the newborn there.
When Zeus grew up, he found his father and tricked him into drinking a poisonous mixture, which caused him to disgorge Zeus’ older brothers and sisters. This is how the ten-year war between the Titans and the Gods started. The gods defeated the Titans and threw them into Tartarus, a dark and gloomy place.
Then the Gods fought with the Giants for many years and once again they were victorious. Zeus became the ruler of the whole world, he married Hera and along with their children and the other gods, they settled in mount Olympus.