So the titans were divine beings, perfect, all-powerful figures, that ruled over the earth before there were even humans to rule over. And at the time. The leader of the titans was Kronos, God of time. Now, Kronos was married to Rhea, who was a fertility goddess. So she started having kids. Obviously. This would be the first 6 gods of the pantheon, the oldest if you will. And the oldest, the first one to emerge? Hades.
Now right of the bat, we have parallels, with Hades being the oldest of a powerful family. BUT LET'S KEEP GOING, SHALL WE!? So before Kronos's children were born, he received a prophecy. Said prophecy told him that similarly to how he had defeated his father before with the help of his siblings, his children would continue the cycle and he would be overthrown. Well, Mr. Kronos didn't like that very much-so when his first child was born...HE FUCKING ATE HIM. HE ATE THE BABY. Oh look, an infinitely powerful shitty father doing awful things to their kid, where have we seen that before!?
ahhhhhhhhhhhhhhh-where was I-OH RIGHT OK-
SO-Rhea has four more kids, and Kronos eats-ALL OF THEM. Just-just eating his kids. Aaaas one does. So by the 6th kid, Rhea is fucking pissed. Aaaand so is Kronos's mother, Gaia who I didn't really get into but basically she's the earth-like she literally IS the planet. So when the youngest (Zues) is born, instead of giving him to Kronos, she gives him a rock wrapped in a blanket instead, and Zues is hidden away until he gets older. So once he gets older he worms his way into getting close with his father by posing as one of his servants. And yadda yadda, shit goes down but basically he manages to free his siblings by getting Kronos to vomit them and then they overthrow the titans. YAYYYYYYYYY-