Try Okami. It's even better than Zelda in my opinion. It's a cool game not just because of the graphics (and the sound and music, which are also actually really good) but the gameplay is pretty darn sweet as well because of how you interact with the environment. It went greatest hits and so you can pick it up now for 20 bucks on amazon.com or gamestop. Gamestop has been consistently selling it for only 20 bucks for a while now. It's a classic and a must-have for the ps2 in my opinion. It took me 60 hours to beat and normally I would have given up around the 30 hour mark but it was just so good. It's the only long game I've really ever played through to the end, and that's saying a lot.:)