'Call of Duty' to fire starting gun at Gamescom trade show\” />
Fans often arrive at Gamescom wearing more or less elaborate costumes – Copyright AFP/File Ina FASSBENDERKilian Fichou and Tom BarfieldMega-selling first-person shooter franchise Call of Duty will blow open the Gamescom video games trade fair Tuesday, headlining a wave of new releases as the industr