7. The Great Palace - Zelda II: The Adventure Of Link (NES)
http://www.youtube.com/watch?v=WiwjchjsB0g "The Great Palace" is basically an escalating series of events rendered to make you as angry as possible. And if you're a bird lover, prepare to change your mind: this level will have you setting fire to your local aviary at 2 o'clock in the morning. The fact Link has to face so many enemies inside "The Great Palace" is unfortunate enough, but the way they spit fire at you - at a seriously frustrating angle that makes dodging so damn hard - just puts it all into perspective. I won't mention that the level doesn't end without you firstly facing off against a creature called The Thunderbird, and then - as if that wasn't enough - you're up against Dark Link. Oh, did I mention it? Whoops.