How About the Kingdom Heart series? They're a classic.
If you're looking for something different, how about the Dynasty Warriors, Samurai Warriors or Warriors Orochi series? (I'm addicted to them! LOL) It's rated T and it's a hack n' slash type of game. You pick a character, and you go kill like, hundreds of soldiers and the enemy commander, without your commander or dying yourself. Don't worry, no blood, once you kill someone, they fall down and dissappear. I will say, for some people doing the same thing over and over for every stage is kinda boring, but if you like to "collect them all" (the characters), then I dunno, you might or might not like it. Check videos on YouTube if you want to get an idea on what it's about or if your parents may or may not approve of it.
Hope you have fun!