I absolutely adore MGS2's crazy ending twist-o-rama. That game suffers pretty badly from cut content in the latter half; Shell 2 is pretty much a straight shot to Emma and back again, pausing in every room for a lengthy cutscene or Codec call. But once you get past the Oil Fence and suffer through Otacon's crying scene, everything gets fucking awesome and stays that way. Plissken reveals he's Snake, and that he's in league with the Ninja ("Change sides? I don't recall saying I was on yours"), you wake up in Arsenal Gear, Solidus drops a goddamn megaton on you with no warning ("This is my son. I taught him everything he knows"). Then it's into Arsenal Gear's alimentary canal, the infamous Codec calls, you get a motherfucking sword, you have an awesome fight alongside Solid Snake, Fortune shows up ("You want eternal rest? I got it right here").
BAM, fight a million Metal Gears. BAM, Solidus flips around like a stone cold motherfucker and lays them all out. BAM, Fortune's betraying Solidus, no wait Solidus is betraying Fortune, no wait Ocelot is betraying EVERYONE ("Charades usually are humorous"). Then the Patriots themselves get on the phone like, Oh, you thought you knew what was going on? Guess again, hotshot: it's the Selection for Societal Sanity and nothing makes sense and you're named after a fighter plane, now go and have a swordfight with the ex-president on the roof of Federal Hall.
Greatest GOAT of all time.