I haven't looked much into either of these titles. I usually get myself a shooter for my 360 once a year. I've played the Halo and COD games. So I'm not unfamiliar with what I'm getting myself into. Always been a fan of the story with Halo and the co-op involved. Black Ops is probably my favorite COD game of the series. Sell me on each game on why I (or someone here on GAF) should purchase either game for the year.