There are a lot of ways to judge the success of a new game. The most traditional method is sales figures–how many people are actually buying the thing? There’s also buzz–what are people saying about the title on the Web. And then there’s this: armed robbery. Using the latest criteria as a gauge, Activision’s Call of Duty: Black Ops is a runaway success.Armed robbers hit a GameStop in Hartford County, Maryland, over the weekend. The duo, carrying handguns, moved the store’s staff and customers into a storage space and nabbed four cases of the game, three days before the title was officially set to launch.The robbers made away with 100 copies of Call of Duty: Black Ops. Authorities are asking for information from any players who were offered a copy of the title, prior to launch.