The game begins shortly before the Battle of Thermopylae where the player takes on the role as King Leonidas, fighting through scenes from both movie and book. Armour can be upgraded, as can weapons and stats. The player battles through hordes of Persian warriors including slaves, spearmen, archers, Immortals, Persian champions, two Persian generals, Mardonius and Hydarnes. The action is furthered when the Spartan army forms a phalanx formation. This is used to fight not only even more Persians, but giant beasts such as elephants as well. As the game keeps progressing, Leonidas gains the ability to wield two swords and change between weapon styles.