Voila j'ai trouvé sa sur le site EA bon c en anglais mais c pas dur a comprendre.
To turn on a 3-D mode in Skate 2: From the main menu, head to the Extras selection, then enter the code "strangeloops." When you enter a game mode after that, you'll notice the colors have been shifted, and throwing on a pair of the old style red-blue 3-D glasses will enable you to view the game in 3-D. The code is a toggle, so if you want to go back to the standard color scheme, re-enter the code
la video qui va avec sur cette page: http://skate.ea.com/media.action