The corridors are quite long (longer than in Chamber 15), so there is plenty of time to pull this off. low, but clear of the goo, and immediately slide left to emerge from the blue portal before the orange portal moves. Shoot a new orange portal along the corridor to hit the far wall at about the same height, i.e. Turning to the left, slide to the right through the blue portal until the glow around the portal changes to orange, but not far enough to fall out of the orange portal and into the goo. From this portal, you will need to be able to sight underneath the sliding partition that blocks the next section of corridor, but not be so low as to touch the toxic goo and take damage. Place the blue portal on a wall nearby and the orange portal on the far wall to the right of the fixed grating in the corner and somewhat below your present level.

Disregard the energy pellet mechanism and advance just until you can see around the corner and along the first section of the corridor above the toxic goo. Place the other portal under your feet as you step out and fall through, getting a boost towards the first room. Orange portal position for the first peek-a-portal.Īs you step out of the chamberlock, place a portal at the other end of the corridor high on the left wall.