Recently I have taken to playing through PixelJunk Monsters on the Hard-core difficulty. Why? I don't know, probably because I'm a masochist. I love tower defense games and one of the very first ones I ever played was in the Warcraft III expansion pack (remember that one?). I fell in love with that level and I've loved tower defense games ever since.
I've posted up a video of me doing a perfect run (Gold Rainbow Get!) on the Special 1 map on Hard-core. Enjoy
Maybe I'll post some more of my Hard-core journey later.