I've spent most time on Tetrisphere; nostalgia may fog the truth but it felt very big, lots of modes, very fast in higher levels and it wasn't very predictable, you always had to have the whole globe right in your head to know the shortest ways to success. It was the most interesting thing I've seen with Tetris. Never really cared about Tetris before except for a casual run every once in a while.
Tetris DS was nice but didn't eat much of my time.







