Activision says Modern Warfare 2 sold 4.7 million units for $310 million in revenues at launch in the US and UK. As reported in Industry Gamers, the tally gives the title the distinction of being the biggest game launch of all time, toppling Rockstar’s Grand Theft Auto IV. Day one sales were helped along by midnight launches at more than 10,000 retail locations across the US. Read more at Industry Gamers.