Kratos Weapons ...

Blade Of Olympus

The Blade of Olympus is a powerful weapon seen in God of War: Ghost of Sparta, God of War II and God of War III. It is a large sword with a bluish light in its blade. It was created by Zeus, forged of the Heavens and the Earth during the Great War to banish the Titans to Tartarus and end the war once and for all.

This weapon was first used in Rhodes, when Zeus sent it down for Kratos to use to destroy the Colossus of Rhodes. Unknown to Kratos, Zeus tricked him into draining all of his godly powers into it, supposedly giving Kratos the "strength to destroy all who oppose the gods." But as the collapsing Colossus of Rhodes' hand crashed down on Kratos, it appeared he was severely weakened by giving his power to the blade. Bloodied and beaten, Kratos tried to regain the sword, only for Zeus to arrive and retrieve it, thus preventing Kratos from regaining his powers. Zeus then shoved the blade into Kratos's abdomen, bringing him to the verge of death, and sending him to the Underworld.
Later, Kratos regained the Blade of Olympus after he went back through time and with it, he fought and nearly killed Zeus on the Summit of Sacrifice. Kratos, intending to thrust the blade through Zeus' chest, invoked Athena's interference, having Kratos end up killing her, instead of Zeus.

When starting another game on Bonus Play, the blade can then be used for the entire game.
From there you can level it up to increase its power and to gain new abilities for it.

It also appears in God of War III, as part of the magic ability of Blades of Athena (Divine Reckoning). Kratos planted the sword on top of Gaia's back during the Titans' siege of Olympus. When both he and Gaia were thrown off of Olympus, Kratos wedged into Gaia in an attempt to hold on but both he and the blade fell into the Underworld. Later, when Kratos retrieved the Blade from a statue of Pandora in the depths of Hades, he was able to use it as a part of the Rage of Sparta. The Rage of Sparta is then the only means by which he may use the Blade of Olympus. Nonetheless, the Blade proved quite useful and strong in defeating some of the major opponents encountered over the course of the game. It was used to slay Cronos and Perses as Kratos journeyed through the Underworld and Olympus, and in the final battle, it was used to kill both Zeus and Gaia. In the very end, Kratos ultimately used the blade to kill himself, thus releasing the power of Hope that dwelt within him, as well as the power within the Blade itself.

Blade Of Athena

The Blades of Athena were chained weapons bestowed by Athena that function similar to the Blades of Chaos. They are the second pair of blades Kratos wields in the God of War series.

Kratos' Equipment: Chains of Olympus

Weapons :
Blades of Chaos: Powerful blades Given to Kratos by Ares when he pledged his alliegance to him. They're a pair of large curved blades that are attached to Kratos' arms via chains. He can swing them about to strike enemies.
Gauntlet of Zeus: A gigantic gauntlet forged by Hepheastus, and used by Zeus to chain the mighty Titans in the depths of Tartarus. It was given to the Jailer of Tartarus to protect, and only he had the key to the Temple of Zeus

Magic:
Efreet: Kratos obtains the ability to use the fiery Djinn after defeating the Persian King during the seige of Attica. When used, it unleashes the fire spirit which attacks all surrounding enemies.
Light of Dawn: After obtaining the Primordial Fire within the Caves of Olympus, Kratos is able to summon orbs of bright light and hurl them at his enemies.
Charon's Wrath: When Kratos battles Charon, the ferryman has the ability to blast green, ravenous flames at the Spartan warrior, via the golden mask he wears. Kratos gains this power after confronting Charon the second time.

Relics:
Sun Shield: The Sun Shield is an object of the Gods used to block attacks and return projectiles. Kratos obtained the Shield within the Temple of Helios
Triton's Lance: Triton's Lance is a spear-like item that Kratos finds in the Caves of Olympus. It allows him to breath underwater, much like Poseidon's Trident.

Blades of Exile

The Blades of Exile are the third and latest set of chained blades wielded by Kratos, given to him by the ghost of Athena in the beginning of God of War III. The blades replaced the Blades of Athena as his primary weapons, as the latter, which he received upon his rise to God of War, were completley ruined by his fall into the River Styx. The new blades also have a slightly different design, but their model does not change as they level up except for the amount of "flames" the blades emit when used.
The blades have attacks similar to their predecessors, the Blades of Chaos and Blades of Athena, but with a distinctly different design, featuring horned demon faces on the hilts, pronounced hooks on their lower edges, and an intricate pattern of orange stripes on the flat sides of the blades, which emit fire. These blades grant Kratos the magic power, Army of Sparta, as well as the ability to grapple enemies.

Blades of Chaos

The Blades of Chaos were a pair of chained blades fashioned by the God of War, Ares. Ares had these blades made for a servant that would prove worthy of the blades. These blades were the first pair of chained blades that Kratos used in the God Of War series.

Nemean Cestus

The Nemean Cestus is a weapon seen in God of War III. It is a pair of large metal gauntlets, each forged to resemble a snarling lion's head, that greatly increases the strength of its wielder when worn. The Cestus was apparently given to its original owner, Hercules, after he slew the Nemean Lion as one of his Labours, but their relation to the beast itself is unknown. In Greek Mythology, this was also used by Helios and Hermes.

Claws of Hades

The Claws of Hades was a chained weapon formerly utilized by the God of the Underworld, Hades. It was later procured by Kratos after the former owner's death.

Nemesis Whip

The Nemesis Whip is a new weapon in God of War III. It consists of a pair of chains, each ending in three claw-like daggers that give off a teal colored aura. It was crafted for Kratos by Hephaestus after he brought him the Omphalos Stone, a decoy that Cronos originally mistook for baby Zeus and swallowed many years ago. Initially, Hephaestus intended to use them as a conduit for his own powers in order to kill Kratos, but the Spartan threw off the attack and turned the Whip against its creator, killing the smith god in short order.
This weapon attacks in a similar fashion to the Blades of Exile, but faster and weaker, with a focus on multiple hits instead of single, powerful blows. The Nemesis Whip has the power to conduct electricity and electrocute whomever stands in Kratos’ way. The blades are useful when levelled up to recharge your Rage of Sparta while fighting.