From ASHPoD-The-Portal-Gun
PORTAL 3 CONFIRMED FOR REAL!!!....Sorta
From the game description:
We all know what happens; Chell deactivates GLaDOS, gets put in extended relaxation only to be reawakened years later to fight again and escape. But what really happened in Aperture Science during the intervening years? Have you ever wondered: Why does Aperture look so different in Portal 2?