NBA JAM!!!!!! so many hours into that game with friends. Checked it out on ps360. I personally prefer the wii version. Just like the gameplay more. With or without motion controls. ( you can use either)

Dead Space: Extraction and The House of the Dead Overkill are two of my favorite games!!! Also the Umbrella Chronicles series are good! But just in case u want a single player game u HAVE to get Metroid Prime 3: Corruption!!!

you have most of the good ones. Dead Space Extraction was a very good co-op game

I know that it's been mentioned, but I would strongly suggest getting the Rayman Raving Rabbids collection that has all of the frist three games on it. It's a bargain, has lots of humor, and will give you many hours of fun if you are into party games.