Theres already a video walk through on the Portal game so heres the cheats. 1) Set console to on in the options menu. 2) Enter a level you're stuck on. 3) Hit the ~ key 4) Type in one of these commands without the quotations. Then hit enter. "god" - robots don't hurt you, nor do "crushers" and the red beams. "noclip" - sets w a d s to up left right down and makes you fly through the walls "antiportal" - lets you put portals on normally non-portal accepting surfaces. Note: All these codes de-activate after you go to the next level.
