Activision (ATVI +4.8%) registers a big gain after announcing it sold over $500M worth of copies of Call of Duty: Black Ops II in its first 24 hours of availability. GameStop (GME +2.9%), which reported strong initial sales for the game earlier this week, is also rallying. The solid early reception for Black Ops II and Microsoft's Halo 4 are fueling hopes the console game industry will cap what has been an ugly year with a decent holiday season.