This game not only has the most beautiful graphic style out of any of the PS2 games, it has a very interesting new gameplay feature to go with the great action: You actually stop time and use a celestial brush to paint stuff on screen, and they manifest themselves in the game to help solve puzzles or defeat enemies. It is a completely amazing feature that I really want to try out. I looked at it on Amazon, and it's $39.95 CDN!
Here's a Wikipedia link.
Ōkami has the player controlling the main character, Amaterasu, in a woodcut, water-color style, cel-shaded environment, which looks like an animated Japanese ink-illustration. The gameplay style is a mix of action, platform, and puzzle gaming genres, and has been noted by many reviewers to have numerous similarities in overall gameplay style to The Legend of Zelda series, an inspiration that director Hideki Kamiya, a self-acclaimed Zelda-fan, has admitted. The main story is primarily linear, directed through by Amaterasu's guide Issun, though numerous side quests and optional activities allow for the player to explore the game world and take the story at their own pace.
Combat is staged in a ghostly virtual arena, and Amaterasu can fight enemies using a combination of weapons, fighting techniques, and brush methods, to dispatch the foes. At the end of combat, money (as yen) is rewarded to Amaterasu, with bonuses for completing a battle quickly and without taking damage. The money can be spent on numerous items from merchants across the land, including healing goods, better weapons, tools, and key items for completing quests. The money can also be used to buy new combat techniques at dojos through the land. Additionally, rare Demon Fangs can be earned through combat which can be traded for additional, unique items that are beneficial in gameplay but not required to complete the game.
By completing quests, side quests, and small additional activitives (such as making trees bloom into life, or feeding wild animals), Amaterasu earns Praise, which can then be spent to increase various statistics of the character, such as the amount of health and number of ink wells for Celestial brush techniques.
The art in Ōkami is highly inspired by Japanese watercolor and wood carving art of the Ukiyo-e style, such as the work of Hokusai.
Celestial Brush
Unique to Ōkami is the Celestial Brush. Players can bring the game to a pause and call up a canvas, where the player can draw onto the screen using the left analog stick to control the Celestial Brush. This feature is used in combat, puzzles, and as general gameplay. For example, the player can create strong wind by drawing a loop, cut enemies by drawing a line through them, or create bridges by painting one amongst many other abilities. These techniques are learned through the course of the game by completing constellations to release the Celestial Brush gods from their hiding spots. The Celestial Brush bears similarities to the use of mouse gestures to perform miracles in the desktop computer game Black & White, in which the player, just like in Ōkami, takes on the role of a god. You basically control the very fabric of time but your ink pots will run out if used too much in one go, making you lose your powers for a short period of time.
There's also a very engaging story, but it's on the Wikipedia article, so go read it if you want - it's too big to post here without being annoying.
You can use whatever site you like to get a review, but you probably won't see anything less than 90/100 or something. 
What do you guys think? Would you want to get it? I really, really want it...
