Clash of the Titans (2010)

The differences between the movie and the myth are so many that I can not remember all but I will point out the faults that I think are the most notorious. First I must emphasize that the film does not reach a good understanding of the whole by Perseus makes the journey to the underworld to kill Medusa, revenge seems to be in the film but never touched again the death of adoptive parents Perseus miss making a very important point in every movie in this genre to be the meaning and coherence, another very important point is that at no time was a poor fisherman Perseus, opposite to what is shown in film, Perseus myth is adopted by a king ... the king Polidectes. In the myth Perseus embarks on the journey with the motive of getting Polidectes did not force her mom to marry and offers instead the head of Medusa.

In clash of the titans, the ultimate struggle for power, faces men against kings and kings against the men.

But the war between the gods could destroy the world. Perseus, born as a god but raised as a man, he can do nothing to save his family from Hades the vengeful god of the underworld. 
With nothing left to lose, Perseus volunteers to lead a dangerous mission to defeat Hades before he can seize power from Zeus and make the earth a hell. Perseus begins a dangerous journey deep into forbidden worlds, leading a group of warriors among those found Draco, an experienced soldier who encourages the rebel Perseus to use their divine powers.

 Battling unholy demons and fearsome beasts, they will only survive if Perseus accepts his power as a god and challenge his destiny and create his own destiny.