I was late to the game (pun intended) and just picked up the duo of Ico and SOTC a couple of months ago. Finished Ico in a day, much like how engaging Portal was. Loved feeling of being immersed in the worlds, the pervasive mood of it all. Reminded me of Myst back in the early 90s. I can understand some people's obsession with SOTC and wanting to find the final 17th "hidden" colossus (as mentioned previously on BB), the desire to not ever want to leave that world.