God of War 2 - Unlockable Costumes

Effect - Code:
Athena - Complete the game on Titan mode.
Dark Odyssey - Complete the game on God mode.
General Kratos - Collect 20 Cyclops eyes. Must kill them with a context-sensitive move. Meaning the O button.
God ArmorThe best costume, Doubles all stats - Receive God ranking in Challenge mode.
God of War costume - Complete the game on any difficulty level.
Hercules - Complete the game on Titan mode.
Hydra Armor - Complete the game on any difficulty level.

Challenge of the Titans:
Successfully complete the game.

Arena of the Fates:
Reach the "Titan" rank in Challenge mode.

Titan mode:
Successfully complete the game to unlock the Titan difficulty setting.

Urns of Power:
Successfully complete the game.

Completion bonus:
Successfully complete the game and save. Select the "Bonus Play" option when starting a new game to have all weapons and magic at the level attained during your previous session.

Alternate package art:
There is an alternate artwork on the other side of the cover sheet on the game's package. Just take it out and flip it over to see it.

Hidden mini-game:
There is a mini game in the first level, when you fight Colossus. When he hits you into the house do not go under the water yet. Get out and run around to the right side. There are two covers. The first has some orbs and the second has two half-naked women in a pool. Follow the puzzle then press the Left Analog-stick Left and Left Analog-stick Right to see what the water fountain does.

Island of the Sisters of Fate: Trap
When you arrive on the island of the Sisters of Fate there is a trap system after the hanging skeletons room. To keep the first door from shut-in on the lower level there is a body near the two red chests. Pick up the body and set it on the trigger to keep the door open.

Using the Golden Fleece:
After you get the Golden Fleece from the Cursed Cerberus you can use it to block and reflect enemy attacks by pressing L1 at the precise moment. However, if you continually press L1 as fast as possible, you will block and return almost every attack.

Hidden HD Mode:
As the game boots up, before even the white text 'SCEA Presents' Legal screen comes up. Hold down L1 L2 L3 thumbstick button Square Circle simultaneously. If you did it right the legal screen will show up in a nice shade of purple. If you want to run in 480p you are still going to need to set that up through the menus as you do normally. This cheat will work on the PS2 and also the PS3. If you are doing this on the PS3 you may need to plug the controller in using the USB cable, as the controller is a little slow to come to life when the game boots