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The first test of Chapter 2 doesn’t take much to pass at all. Your first portal needs to be placed on the left-hand panel as shown above.

Now make your way onto the blue glass lift at the back of the room, turn around and look upwards towards the ceiling.

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There’s a part of the ceiling that doesn’t have any shaded panels on it (check out our screenshot above), fire your exit portal here.

If you’ve placed the second portal correctly, the laser beam will pass through them both, powering up the lift, allowing you to take the exit behind you.