here's a 2D version of Portal. yeah yeah it's only flash but the game mechanics are the same. oh.. twice the number of levels compared to the original game for a mere 6MB download.

http://portal.wecreatestuff.com/
[img width=500 height=281]http://portal.wecreatestuff.com/p3.jpg[/img]

direct link to the flash game if you want to download it and save it to your computer: here