Remember that Mario + Portal indie game I mentioned before? Now it has a 2-player mode.
Much like Portal 2, Mari0 looks to have a 2-player feature. Each of the brothers holds their own portal gun and I assume that it'll have the same properties as the 2 player aspect in Portal 2. I can't wait how the puzzles will turn out with this one.
What's interesting in this video isn't the 2-player aspect though but about the splitscreen. When the two brothers are close to each other there is no split. When one ventures off too far that's where the split happens. However the screen splits depending on which side of the stage each brother is in. Watch how the screen moves in 0:25 too see what I mean.
I can't wait for this one. :D