OK, let's get it out of the way right now. Pandemic's war-fuelled action game is possibly the most blatant GTA clone we've ever seen. You can walk, fly or drive across a huge landscape and you can even commandeer (or, in GTA terminology, 'jack') every vehicle that you come across (except planes... damn). But if imitation really is the sincerest form of flattery, you may as well be buttering-up the greatest game out there and Mercenaries does a good job of doing just that.Unlike GTA, the action ...