[Following on from the first two parts, this is the grand finale of Quinns' evisceration of the game Walker described as "Oblivion with Cancer". As a compliment. Lots of spoilers, but you should read it anyway.]Butchering Pathologic Part III: The SoulThere are two themes that run through Pathologic like a couple of sharks lurking in a swimming pool. By themes I mean something that's vital…