I don't see how the plot could be relevant here - the whole debacle is about graphics which in this case are somewhat advanced and with rich geometry considering the weak platform the engine is running on and it's very smooth, running at 60FPS however end up looking ass because you can see a clear lack of an art direction and because you could kill someone with blocky textures like this
(see: very first shot), proving once more that you can shove as much geometry into a model as you want and it'll still look blocky if the texture is terrible. We're not discussing the plot.