this is a video of Aperture Science DS, a completely free homebrew adaptation of portal for the nintendo DS. I wrote all the code and lobo ( infectuous.com ) made all the graphics. This video shows one of the test chambers present in the game's first public release; hopefully you'll notice it was inspired by one of the original's chambers !
this first version was rushed and is extremely buggy however so please don't expect too much ! especially considering how terrible a level designer I am.