Hydarnes (Ancient Greek: Ὑδάρνης; Old PersianVidarna "the ripper") was an eminent Persian, the commander of the "Ten Thousand Immortals" during the time of king Xerxes invasion of Greece.Hydarnes was a famous soldier and commander loyal to the great Persian Empire. He served King Darius and his son Xerxes as well. Hydarnes tried to stop Xerxes from his foolish mistakes from time to time. After the battle of thermopylae, Hydarnes stopped serving Xerxes. If Xerxes had listened to Hydarnes in his battles he might have been more successful in battles and wars against Greece. Hydarnes helped King Darius a lot in order to become Emperor before the fake Bardiya completely jeopardized the empire.
Perhaps the most famous episode involving Satrap Hydarnes and his Immortals came at the Thermopylae in 480 BC, when they came into contact with Leonidas of Sparta.
According to Persian Resources, Hydarnes or Vidarna led King Darius's Persian Army and jeopardised and destroyed the Medes army and went to Pasargadae and stopped the fake Bardia.
Hydarnes' name was ruined because he served Xerxes at Thermopylae. He was a great Persian Commander and Satrap and died apparently in a desert in Middle Persia.
In the video game 300: March to Glory, Hydarnes is the boss of the level "Persian Camp".He looks like the other Immortals, with gigantic blades for hands and can launch claw missiles as well as call 2 Immortals at a time.