"It was nanobots all along!!!"Ninjat_126 said:METAL. GEAR. SOLID. 4.
Not that stupid, really, but just insanely complicated, messed up, distorted, warped and twisty. That just makes it better.
Seriously, fighting an army of cow-robot-frog-tanks with a rail gun while a cyborg ninja and immortal vampire-ninja have a knife-fight on top of a nuclear-equipped-walking-tank adds to the experience like you wouldn't believe.
I just gave you the entire complicated mess of metal gear solid 4's plot in 5 words.