Get Tiget Woods PGA tour 10 with WM+. Even if you're not a big golf fan, it's a fantastic game. I'm not a huge golf fan (only a mild golf fan) and I love it, and am totally addicted to it.
Also Boom Blox Bash Party (MUST HAVE)
Trauma Center New Blood
and alot of other things that have already been mentioned.
You can find me on facebook as Markus Van Rijn, if you friend me just mention you're from VGchartz and who you are here.