Fallout 3 was good until I realized that the main plot revolved around who gets to purify irradiated water (not a difficult task at all) using the Jefferson Memorial, which is at the mouth of a tidal basin. A war is being fought over who gets to turn on the tap of a machine that does nothing but piss in the ocean.
I had to stop playing. Who would green-light a story so daft?
To be fair, you can boil almost any real-life war down to something equally ridiculous.