What exactly do you want to know?  The best one out or just a fun one that will give you some hours of enjoyment or do u mean just in general.

Well, if you're a fan of strategy RPGs, I highly recommend Disgaea 3. While I didn't find the story as amusing as the previous installments, the gameplay was just as addictive.

Little Big Planet is really a fun platformer. Katamari Forever is crazy, but fun. Wolfenstein is fun if u wanna shoot nazis.

Valkyria Chronicles

Infamous is a great single player game but it does get somewhat repetitive... Batman is also a pretty good game (especially if you're into collecting things or completing challenges). And for multiplayer, LittleBigPlanet (Game of the Year Edition) is the way to go. There are tons of awesome games to choose from...

easily LBP if ur a casual gamer who doesnt want violence all the time

even if u do, its awesome!!!

Ok, you guys can see what type of games I like in my profile.

Killzone is a sure bet.. GTA4 also...

are you more of a solo player or do u prefer to play with buddies? well i recomend u wait for the upcoming assassins creed 2... and if you have to buy ryt now... Batman AA is just awesome

xChocolate Bear:

I still have to get LittleBigPlanet at some point. That game is just awesome.

get the game of the year version!