Update, Oct 20:<\/strong> After a handful of launch issues have seemingly been ironed out, the Call of Duty Modern Warfare 2 campaign is out now on Steam, Battle.net, Xbox, and PlayStation.<\/p>\n Yes, if you missed the marketing blitz, Activision Blizzard is offering early access to the campaign for all digital Modern Warfare 2 pre-orders, so you can play the single-player mode a full week before the rest of the game launches.<\/p>\n