• Glitches
  
  Max Weapons Glitch
  
  (Unconfirmed) Beat all Challenges of Olympus to unlock the Combat Arena. Start the Arena on Titan difficulty and die a few times. When the game asks if you'd like to switch difficulties, choose "No." Quit out and start a new game and you'll have all your weapons maxed out -- even in Chaos Mode.
  
  
  Weapon Carry Over Exploit
  
  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).

Unlocks

Chaos Mode

Beat the game on Spartan, God or Titan Mode to unlock Chaos Mode (Very Hard).

Modes

Perform the actions below to unlock additional modes:

Challenge of Olympus - Beat the game on any difficulty.
Combat Arena - Beat Challenge of Olympus (all challenges).

Costumes

The following costumes can be unlocked by performing the actions below.

Equip new costumes in the Treasures menu. Fear Kratos - Beat the game to unlock this costume. "Fear Kratos" does quadruple attack damage. Enemies do quadruple attack damage. Trophies are disabled.

• Extra Red Orbs
  
  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.