Deimos

Cast aside as a youngling, and deemed unworthy to join the Spartan army, Kratos' brother died in solitude, and came of age in the Underworld, fueled by hatred.

Silhouette of Kratos' brother

Early Life

Kratos was not an only child, as he once had a twin brother. However, when they were young, while Kratos was deemed fit and worthy, his brother was deemed weak, and was sent to the mountains to fend for himself, where he died. Kratos lived on to become a legendary warrior, but his brother, coming of age in the Underworld, only had one desire; vengeance against the brother who had abandoned him.

History

Little is known about Kratos' brother as of this moment, although from what can be inferred, his time in the Underworld has made him somewhat demonic in appearance and power. What little is known, is shown in Birth of the Beast.

In God of War III

In God of War III, Kratos discovers two notes in Hades. The first seems to be written by Kratos' mother, claiming that all who get close to her son die, including his own brother. Later, a second note appears written to Hades himself, cursing Kratos and seeking a chance at revenge very similar to his own:

"I beg at your Palace gates, grant me a reprieve! Have I not become all you have wanted? Are my debts not paid in full? How long must I hope for a rescue that will never come? He becomes a god, while I rot and suffer. Release me so that I may have my revenge!"

(Although, [[Alrik|Alrik]], the barbarian king who was slaughtered by Kratos with the help of Ares, could have written this note)

At the end of God of War 3, Gaia confronts Zeus and Kratos and admits regret in helping the Spartan. Zeus claims that since Kratos failed her, she "...should have chosen the other one".

Also, when in the Darkness, Kratos comes across pool of blood. After waiting a bit, a pair of interesting dialogues can be heard, when a male voice speaks out and says:

"Spartans never let their backs hi the ground. Right, brother?"

"Don't leave me again Kratos!"

Trivia

• It is likely that the death of Hades allowed Kratos' brother to escape the Underworld with the rest of its imprisoned souls, opening up possibilities for his appearance in the future.
• It is also possible, although not confirmed, that Kratos' brother may appear in the upcoming game God of War: Ghost of Sparta, since the game is touted to explain "the origin of Kratos' family."
• Although making no actual appearance in any game in the series to date, there has been much speculation to his existence. The Assassin from God of War: Betrayal is speculated to actually be Kratos' brother. His involvement would possibly explain why Hades' minions also appear to attack Kratos during the game.
• Several characters have made mention to a mystery entity that might be Kratos' brother. At the end of Chains of Olympus, when asked by Helios on the condition of Kratos, Athena informs him that "He'll live. They must". Also to be considered is Zeus' statement to Gaia saying she should have chosen 'the other one'.
• Although unproven, it is possible that Kratos' brother could very well be Thanatos; the embodiment of death.
• Because of the mystery surrounding his identity, and the question whether or not Birth of the Beast is to be considered canon, Kratos' brother is one of the most famous characters in the God of War Series.
• Since Zeus is the father of Kratos, it is assumed that Kratos brother is also the son of Zeus, making him a Demigod.