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Test Chamber 05 (Advanced)
This is the first advanced Test Chamber of the game. This version is unlocked when the original Test Chamber 05 has been completed. It has the extra challenge of including a Goo entrance, less white surfaces, a harder timed puzzle and a Material Emancipation Grill near the exit.
- Put a portal in the next room and the other near you, then jump over the Goo to pass through the portal.
- Look up then place a portal on the highest white wallpanel, and the other on a wall near you.
- Before going through the portal, aim the top of the pillar. Just after passing through the portal, shoot a portal on this top.
- Go through a portal on the ground level to reach the pillar's top.
- Fire a portal on the angled panel, and place the other at the bottom, then go through this last. You should reach the ledge after the Goo area.
- Place the same portal as the previous on a white surface at the next level, then jump through the portal on the angled panel.
- Go through the Material Emancipation Grill and prepare yourself for the timed puzzle. When you are ready, push the Switch and come back quickly to the vertical door now open.
- Put a portal on the angled panel above and the other on the top of the pillar, then jump through.
- You are now on the next level. Place a portal on the floor next to the angled panel and jump through the portal on the pillar's top.
- With the momentum you gained, you should reach the exit. If you fail the landing, try the timed puzzle again.
- Go to the Chamberlock.