Ride a hawk, bird, lizard or eel
Get behind one of those creatures, then press R1.

Quick gallop stop
Press Left Analog-stick Down + X.

180 gallop turn
Quickly press Left Analog-stick Down + X, Left Analog-stick Down + X.

Standing gallop
Simply hold R1 + X.

Hard difficulty
Finish the game completely and save when asked to after the credits. A new game can be started in the hard mode.

Different ending sequence
Eat fruit from the Secret Garden to lower your HP as much as you can. Now Dormin will now be killed when he is shot by the crossbow, and will change the next few sequences.

Different introduction sequence
Just turn on the game and let the introduction sequence start where your character is riding Agro. Then press Start so that the title screen will be displayed. Then allow the game to idle and a new introduction sequence will be shown. This time, the setting is where you last saved your game. It will show your character resting or sleeping at the altar. Then, Agro will start walking away and begin to run and roam all over the area.

Time attack mode
Finish the game and save when asked after the credits. You will be given a bonus item for every two Colossi beaten in Time Attack mode. Within the normal difficulty setting, the bonus items below will become available.

Whistling Arrow: Distracts a Colossus.
Cloak of Force: Sword damages a Colossus more
Mask of Strength: Inflict greater wounds to a Colossus.
Lizard Detection Stone: Detects white tailed lizards.
Fruit Tree Map: Reveals the Fruit Trees on map.
Mask of Power: Inflict greater wounds to a Colossus.
Cloak of Deception: Invisible to a Colossus.
Flash Arrow: Explodes when hits Colossus.
Brown Horse: Hold Square to start game at the main menu to get a brown horse.

When your playing Time Attack mode within the hard difficulty setting, the bonus below items will become available, in thisorder:

Harpoon Of Thunder
Sword Of The Sun: Light beacon operates in patches of shadow.
Fruit Tree Map: Reveals the Fruit Trees on map.
Shaman's Cloak: Increase defense and lessen damage.
Lizard Detection Stone: Detects white tailed lizards.
Shaman's Mask: Increase defense.
Cloth Of Desperation: Parachute for safe landing
Queen's Sword From Ico

Brown Agro
Beat all sixteen Colossi and access every item in Time Attack mode within the normal difficulty setting. Then, hold Square when your at the title screen.

White Agro
Beat all sixteen Colossi and access every item in Time Attack mode within the hard difficulty setting. Then, hold Circle when your at the title screen.

Reminisce mode
Make your way to the corpse of the Colossi and press Circle to pray. The graphics will switch to a old film appearance.

Secret Garden
Finish the game four times and obtain a large amount of stamina. Then travel to the ends of the world and find the patch of ivy on the northeast side of the shrine. Now climb up the ivy and follow trail all the way up and around the ledge to your right. Jump across at the other end of the ledge to get to the next set of ivy. Keep on until you get to another ledge above that you have to climb around. Once your at the other side of this ledge, climb to the right then shimmy across another ledge that leads you behind a column. Jump to the ivy-covered column, then keep climbing. The ivy will lead you to a walkway. Then climb the stairs and walkway to the left of the garden. Note: If you eat fruit from the trees it will causes harm. You must beat a seventeenth Colossus to keep on to the end of the path to the top of the temple.

It is feasible to reach the Secret Garden early. Locate the patch of ivy behind the Temple you start at. If your grip meter is high , you can jump straight up the side until you reach the first ledge, which has a patch of leaves on it. Now position yourself under that patch of leaves. Then keep holding Grip/Duck and jump straight up. Your character will duck in those leaves, which will allow you to refill any lost grip. Then, keep going around and up the side until you get to the path leading to the garden.

Control intermission sequences
The view can be moved and zoomed in during every intermission sequence. You can also have the game to idle in the introduction sequence to see Agro exploring the world without Wander.