Movement Mastery

Master the 'Lasers' section of Portal Reloaded with this detailed walkthrough. Learn how to solve Test Chambers 13, 14, and 15 using portals and time manipulation.

This guide covers the 'Lasers' section of Portal Reloaded, focusing on Test Chambers 13, 14, and 15. It details how to use portals and time mechanics to overcome laser-based puzzles.

Test Chamber 13

Start by placing portals as shown in the image. Use a portal to redirect the laser sideways and a time portal to send it into the future. You can take some laser damage to enter the future. Once in the future, rearrange portals without affecting the present. Position portals so the laser hits the target, then proceed through the door.

Test Chamber 14

First, travel to the present using a time portal. Summon a reflector cube from the central switch and position it in the present as indicated. Use a portal to bring a laser through the first node, then use this to reflect the laser into the next two nodes. Travel to the future.

In the future, use portals to bring a laser into the present, ensuring it passes through the node. Retrieve the reflector cube from the future and bring it to the present. Ensure the present reflector cube hits all three nodes, adjusting its position as needed. You may need to return to the future to retrieve the future reflector cube again if you moved it.

Finally, place the future reflector cube at the end of the nodes to reflect the laser into the receiver, completing the chamber.

Test Chamber 15

Begin by passing through the particle field on the left. Place a portal where the laser hits the wall and a time portal on the opposite wall. Travel through the time portal to reach the future, bypassing the particle field. Proceed to the other side of the room and use another time portal to return to the present, now on the other side of the particle field.

Place a new portal on the upper wall above the laser room so the laser hits the first receiver. Travel to the future and place a portal on the small wall in the laser room to aim at the receiver. Return to the present. The laser should still be hitting the first receiver, powering an elevating platform. Stand on the platform and shoot a time portal behind the node.

This action will raise your platform, allowing you to summon a reflector cube. Place this cube on the lip above the second receiver. Travel to the future and retrieve the future reflector cube. Bring it back to the present by placing a time portal in the laser room. Position the cube to reflect the laser into the second receiver through the node.

To proceed without crossing the particle field, use an existing portal on the other side or a time portal. You need to be in the present on the other side of the particle field. Climb the stairs and use a portal on the upper wall to hit the third receiver. Move the reflector cube onto the switch to complete the test chamber.