Of all Valve�s franchises, Portal always seemed like the most Nintendo-friendly. Its shooting mechanics are more about puzzle-solving than violence, it�s funny but not wildly inappropriate, and GLaDOS stands right beside Bowser and Ganondorf in the pantheon on classic gaming archenemies. But while owners of Nintendo products never officially got to check out all the cake memes and Cave Johnson tirades, thanks to one intrepid homebrew developer, now they too can get a taste of the tests. Check out this demo of Aperture Science 3D, an unofficial Portal remake for the Nintendo 3DS.