There are no end of battle scenes, interminable and incomprehensible, in which beheading and skewering are routine. You'd think the waves would wipe out civilization, but the payoff seems mostly when everybody finds themselves covered with mud. One legendary character does dive into the sea, turning into a kind of missile and impacting like a bomb, creating a giant tsunami. These characters all seem compelled to live as close to the edge as possible, where they run nimbly, survey the horizon, push each other, and never look down to check their footing. No one on the cliffs but Gods, heroes, Oracles, warriors and suchlike. In fact, all of Greece seems to be on the edge of a drop of hundreds or thousands of feet, although sometimes in the far distance we see flatlands, which are no doubt where the peasants live. That allows for lots and lots of towering cliffs. The movie is sometimes completely CGI, and there must not be many scenes with no computer work at all. This sounds great, but when you're shooting arrows at tens of thousands of enemies, your fingers could get bloody pulling that bow string.
Much depends on the possession of the hidden Epirus Bow, which can fire arrows that materialize from thin air and guide themselves to a target. It involves, in a very broad sense, the attempt by King Hyperion ( Mickey Rourke) to conquer Greece, and the battle to stop him led by a plucky peasant named Theseus ( Henry Cavill).