God of War III Cheats

Bonus Play Items
There are several bonus play items that can be collected throughout the game. Once they have been obtained, they can be used during bonus play (once you have beaten the game once). Note - enabling any bonus play items will disable cheats.

Aphrodite's Garter- Allows continued use of the Blades of Athena: When you reach Aphrodite's chamber, go to the left of her bed and glide behind it using Icarus Wings.
Daedalus's Schematics- Infinite Item Meter: Can be found in the room with several warpholes after a puzzle-solving sequence.
Hades' Helm - Max health, magic and item meters: After killing Hades and jumping into the River Styx, swim down and to the right (against the current) and locate the helm at the bottom of the river.
Helios' Shield - Triples combo meter: Located to the right of where you kill Helios.
Hephaestus' Ring - Automatically win all context sensitive attacks: After you kill Hephaestus its located on his left by the pool of water.
Hera's Chalice - Slowly drains health meter: Located to the left of where Hera falls in the garden.
Hercules' Sholder Guard - Decrease damage taken by a third.: After finding Hercules floating in the water swim beneath him to find his Shoulder Guard
Hermes' Coin - 10x red orbs: Located behind the rubble while chasing Hermes.
Poseidon's Conch Shell - Infinite Magic: Located in the chamber where you rescue the Poseidon Princess.
Zeus' Eagle - Infinite Rage of Sparta: Climb the wall to the right of the Heart of Gaia; item is located on the ground in plain view.

New Game+
There is no New Game+ option but you can do a glitch that gives you maxed out weapons and infinite magic at the starrt of the game. First you must unlock the Combat Arena. Set magic to infinite. Get killed in the Combat Arena 5 times so that the game asks if you want to switch to easy mode. Choose no. You should be at the main menu now. Start a new game on whatever difficulty you were on during the Combat Arena. You will begin the game with all weapons maxed out and infinite magic.

Extra Modes
Challenges of Olympus: Beat the game
Combat arena: Beat all challenges

Trophies
Are You Horny to Win? (Silver): Collect all of the Minotaur Horns
Bloody Hell (Bronze): Cover Kratos in 500 buckets of blood by killing the enemies
Burnt to a Crisp (Bronze): Acquire the Bow of Apollo
Eye Candy (Silver): Collect all of the Gorgon Eyes
Feather Plucker (Silver): Collect all of the Phoenix Feathers
Freezer Burn (Silver): Acquire the Boreas Icestorm
Handy Man (Bronze): Sever Gaia's Hand
Hit Man (Bronze): Perform a 1000-hit combo
Hitting Your Stride (Bronze): Upgrade any weapon to the next level
Hooker (Silver): Kill Hades
I didn't do it… But I wish I did (Bronze): Kill the Poseidon Princess
It's getting hot in here… (Bronze): Burn 100 enemies with the Bow of Apollo
Ladies Man (Bronze): Successfully entertain Aphrodite
Maxed Out! (Silver): Completely upgrade all weapons
Mr. Hand (Bronze): Discover the secret 'Hades Arm' room
Nice Tan (Bronze): Blind 100 enemies with the Head of Helios
No Guts, No Glory (Bronze): Gut 3 Centaur Generals
Obedience School (Bronze): Deliver 50 kicks to Hounds
Open Sesame (Bronze): Open the Gates of Tisiphone
Priceless (Gold): Collect all of the 'Godly Possessions'
Releasing the Floodgate (Bronze): Kill Poseidon
Rescue Me (Bronze): Save Pandora
Retribution (Silver): Kill Zeus
Rip One! (Bronze): Rip apart 1 Olympus Sentry
Seeing things from a different perspective (Silver): Solve Hera's Garden
Shine Lord (Bronze): Kill Helios
Shoe Delivery (Bronze): Kill Hermes and acquire his Boots
Sibling Rivalry (Silver): Kill Hercules
Souled Out (Bronze): Summon every Soul with the Claws of Hades
Three Wise Men (Bronze): Solve the Three Judges
Titan Slayer (Silver): Kill Cronos
Unhuman (Gold): Beat Titan Mode
Up to the Challenge (Gold): Beat the Challenge of Olympus
Vengeance Complete (Gold): Beat the game