Yeah I finished portal, its quite a challenging game, believe me. There are only 19 test chambers, and then you have the maintanence areas which lead to the final area. The motto is difficult to explain... you seem like a test subject for testing the portal gun, but its not exactly the case. heres a hint - tune up the volume and listen to what the glados says in all levels carefully. this is like a spiritual successor to system shock 1&2
@chess
if you have nvidia graphics card, get portal demo called "portal the first slice' via steam for free.
*www.steampowered.com/v/index.php?area=app&AppId=410