Red Dead Redemption is sooo trying to make me want to play it.
Rockstar is trying to make sure they do enough things right, that I have no option but to pick up that game, which honestly, I was thinking about doing anyway. Adding a free Co-op mode DLC is a great start. They aren't the first ones, nor will they be the last to do it, but atm, they've got my attention.
It's on the same level as Splinter Cell: Conviction, which also adds a total DLC mode to gameplay.
Also for those of you who may have missed it, here's some notes from Joystiq, about Bungie's teaming with Activision. It's totally possible to have missed these, especially in light of the recent IW situation/drama.