[baseless asinine opinionated conjecture] forza vs. gran turismo: old rivalry, though forza's been gaining the upper hand the last few years halo vs. killzone: 2005- we'll kill halo 2006- we'll kill halo 2007- we'll kill halo 2008- we'll kill halo 2009- we'll kill halo 2010- we'll kill halo 2011- we'll kill halo 2012- we'll kill halo 2013- we'll kill... something splinter cell vs. mgs: clear victor here. call of duty vs. battlefield: that noise is my iq dropping to the floor gears of war vs. uncharted: why is this a rivalry again?