After leaving the elevator and climbing the stairs, follow the corridor then head to the sparkling portal device in the center of the room.




The floor will collapse below you and you will fall down, landing in water. Wheatley will ask you if you see the gun. Follow the corridor and find the stairs with the sparkling device on top.



This will be a blue portal gun that will let you create a blue portal. Create a portal on the wall behind the stairs and enter that portal.


 Enter the portal, turn right, and head up. You will pass through a room with computers in it.



 Keep going past the room, you will reach a section with a glass. head past the half of the window that has no glass, and fall down a little to the platform.



The announcer will tell you that some emergency testing may require prolonged interaction with lethal military androids and will assure you that all lethal military androids have been taught to read and provided with one copy of the Laws of Robotics, to share. Shoot open a portal in the wall in front of you using the portal gun. and go through it.


Turn left towards the direction of the door with the blue person on it. Go down the stairs, and aim your gun to create a portal on the wall in the top platform (see screenshot).



 Go back through the orange portal and you will emerge in the platform where you created your portal. Go through the door.



The announcer will tell you that if you feel that a lethal military android has not respected your rights as detailed in the laws of robotics, to note it on your self-reporting form and a future Aoerture Science Entitlement Associate will initiate the appropriate grievance-filing paperwork. Head through the barrier and down the stairs. After the debris has cleared, take the elevator down. You have now reached test chamber 03.