INSIDE is the free game of the month on Xbox right now. I just finished it last night and I really liked it but I have no clue what the heck the developers were trying to say or the story they were trying to tell. There was no dialogue and no cut scenes and no interruption in game play from start to finish. The whole thing took me about 4 hours split over 2 nights. It wasn't terribly hard - all of the puzzles could be worked out either instantly or after a few minutes thinking about it.
Have any of you played it?