heres a lot riding on this years Call of Duty , the inescapable first person shootfest thats been lobbing a grenade into the autumn release schedule since 2003. Previous instalment, Black Ops 7, performed poorly compared to previous titles, forcing Activision to post a semi apology to fans. And thats not the only challenge Modern Warfare 4 is facing: theres a new indie shooter, Wardogs, promising a feel somewhere between classic CoD and Classic Battlefield. Then, lurking on the horizon, in...