God of War III

Successfully complete all challenges.

When fighting those sword-wielding Olympian skeletons, kill some so that there about ten left and position Kratos with his back to to a wall. Equip the Claws of Hades (which need to be at level 2 or higher). Repeatedly lash out with the Soul Rip (L1 + CIRCLE) and you'll get hundreds, even over a thousand hits on just a few enemies. The Soul Rip attack deals very little damage. On hard modes you can probably increase the hit count further and be rewarded with more red orbs. Note: If you don't back against a wall you'll have to move towards enemies a bit after each attack.

Collect the following Godly Possessions to gain the corresponding effect after the game has been completed. The Godly Possessions must be equipped in the "Items" menu for their effect to become active.

Zeus' Eagle: Unlimited Rage of Sparta.
Hades' Helm: Maximum Health, Magic, and Item meters.
Helios' Shield: Triple the Hits counter.
Hermes' Coin: Collect ten times the amount of Red Orbs.
Hercules' Shoulder Guard: Decrease damage taken by 33%.
Poseidon's Conch Shell: Unlimited Magic.
Aphrodite's Garter: Continue to use Athena's Blades.
Hephaestus' Ring: Automatically win all context sensitive attacks.
Daedalus' Schematics: Unlimited Item meter.
Hera's Chalice: Health meter slowly drains over time, but never completely emptying it.

If you get the Platinum Trophy in God of War III you'll be directed to a mysterious website featuring only a compass and falling rain...

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.

Complete the following tasks to unlock PlayStation 3 trophy rewards.

Use this glitch to have all weapons and items unlocked and fully upgraded when you start a game on any difficulty. - Beat the game on any difficulty to unlock the Challenges of Olympus - Finish all seven Challenges of Olympus to unlock the Combat Arena - Start a round in the Combat Arena on Titan difficulty (any other settings are your choice) - Die in quick succession, until the game asks you if you would like to switch to Easy Mode. Choose 'No'. Begin a new game, and enjoy. Best used immediately before attempting Chaos Mode.

Complete the following tasks to unlock PlayStation 3 trophy rewards. Equipping a Godly Possession item will prevent trophies from becoming unlocked.

Instead of meeting Aphrodita in a chamber in the Upper Gardens area, go there without talking to her and open the two Red Orb chests. Collect them, then return outside and get past the moving platform and mechanism that is next to the ledge. Return to Aphrodita's chamber and you can open the Red Orb chests again. Do not talk to her, and repeat the process as many times as desired.

There is a glitch where you can carry over your weapons and stuff to a new game. Note that this is an exploit, and may be patched with future updates to your Playstation 3...

You need to pass Challenge of Olympus first.

Open up Combat Arena and set up the game as such:

Health: Unlimited.
Magic: Unlimited.
Item meter: Unlimited.
Difficulty: Titan.
Other settings will not figure into this exploit.

Enemy 1: Gorgon Serpent (set to count 3 with attack and respawn on).
Enemy 2: Gorgon (set to count 3 with attack and respawn on).
Start the match. Proceed to die five times by jumping in the air as the Gorgons freeze you causing Kratos to shatter (and die as a statue) as he hits the ground. Once you have done this, you will be asked if you want to switch to Easy Difficulty. Select "No" and upon choosing this, you will be taken back to the main menu.

Choose 'New Game' at whatever difficulty you like and you will now have all the weapons, unlimited health and a good chance to break the game by breaking things before you normally would(i.e Smashing the onix on the back of the Three Judges heads).