I just bought a PS2 from a friend and went out and got some games and a certain title caught my eye: Socom: US Navy Seals. Well, I've played many games and beaten them on their hardest difficulty, buy Socom is the hardest. I have never had to try the same level over that many times to beat it once before.

So now the question: What is the hardest video game you have ever played and (if you know why) Why is it so hard?