One of the biggest video game launches ever is going down tonight at stores all over the U.S.  “Modern Warfare 3″, the eighth game in the “Call of Duty” series is going on sale at midnight While the usual suspects like GameStop and Best Buy will be open late to accommodate the crowds, Wal-Mart is going all out by hosting tournaments centered around the game at more than 2,700 stores starting at 8 p.m..