Map Legend
1.Test Chamber 02 Start Point
2.Test Chamber 02 End Point
3.Test Chamber 03 Start Point
4.Chamber 03 End Point
Turn right after exiting the lift and wait patiently for the blast doors to open. When you reach the bottom of the stairs, you should see a blue portal between two lightly illuminated metal bars. If you don’t see it immediately, wait a moment, and it will pop up. Proceed through this portal.
Ignore the blast door to your right for now, after emerging through the orange portal You have to keep your eye on the prize: The Aperture Science Handheld Portal Device (AKA the portal gun) is in the pit below you, just off the edge of the surface you’re standing on. Jump down and grab it.
Rejoice in the fact that you’re now strapped with a half-functioning portal gun. Simply press FIRING MODE 1 to place a blue portal anywhere you wish. Note, however, that it is not possible to deploy them on certain types of surfaces. You know the surface you’re pointing at is OK when the outline of your oval-shaped reticle is filled in. Fire a blue portal anywhere within reach, then emerge through the orange portal that originally led you into this room. Turn right and exit the Test Chamber.
When you exit the lift, you’re immediately presented with an impossible-to-jump gap. Luckily, there’s a orange portal just beyond it. Fire a blue portal on your side of the gap, and walk through.
Upon emerging from the orange portal, you see another gap of similar size. This time, zap a blue portal at the far end of the gap, right next to the exit and walk back through the orange. Voilà! You’ve arrived at the exit! Now you’re thinking with portal science.