Shadow of the Colossus PS2 Cheats

Hard Difficulty:

 Beat the game to unlock Hard Difficulty and Time Attack modes. 
Raising Health:

 Look around for fruit trees or get the Fruit Tree Map (see below).  When you see one, shoot down a fruit with your bow.  Eat it to raise your maximum health. 
Raising Strength:

 Find and kill white-tailed lizards and eat their tails to increase your strength.  The Lizard Detection Stone (see below), makes this much easier. 
Flying:

 After beating a decent number of colossi (10 or so), birds will appear around the main temple.  Jump at them and hold R1 to grab them. 


 

 Normal Time Attack Bonus items.  You'll receive them for every 2 Colossi defeated, in this order: 

Brown Agro:

Collect all items in normal Time Attack mode. At the title screen, hold Square to turn your horse brown.

White Agro:

Collect all items in hard Time Attack mode. At the title screen, hold Circle to turn your horse white.

ICO Crest:

If you have a savegame from the original ICO on your memory card, Agro will have the logo on his head instead of the normal one.

Secret Garden/17th Colossus:

Beat the game on all four modes (normal/hard & game/time attack). Then climb the outside of the temple to the secret garden at the ends of the world. The 17th colossus will appear in a short cutscene like the others, busting through the rear wall. After you fight him, the path to the very top of the temple will be opened, leading to a surprise.

Map Locations:

Each individual Colossus can be found at the following map coordinates:

1: F-5

2: F-3

3: E-2

4: G-5

5: H-4

6: D-6

7: D-1

8: G-6

9: D-3

10: B-4

11: F-1

12: G-2

13: E-6

14: C-2

15: G-1

16: F-8