Let's look at Aaron Greenberg's, Director of Product Management for Xbox 360 and Xbox Live, latest tweet
"Just in from research team (NPD): Halo 3 has outsold Resistance 1 + 2, Uncharted 1+2, Killzone 2 and God of War III COMBINED....wow
Ugh. It's been a long time since I cared about who sold more and just cared if I had fun on a system no matter who it's by. I'm glad that Halo 3
did really well for Microsoft but as with many things, quantity doesn't equal quality. There are two games on the right side that I would always play over Halo 3
in my opinion. But, it's things like these that a lot of gamers clamor over.