You lost your memory, you are alone in a world full of danger, and your mission is survive using your mind. The only way to get out from this hell is.....Hi i'm GLAdOS, and welcome to the amazing world of portal 2, here i will expose you to a lot of tests, and try to k.. help Aperture Science envolve in a new era. Your job is advance in the levels i propose and get better and better, you will have an portal gun to help you, and remember nothing is impossible if you try, and try again and again and again.... The puzzles are waiting for you!