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Navigate the challenging laser puzzles of Portal Reloaded. This guide provides step-by-step walkthroughs for Test Chambers 13, 14, and 15, detailing the use of portals and time portals to solve complex laser redirection.

This guide covers Test Chambers 13, 14, and 15 of Portal Reloaded, focusing on the use of lasers, portals, and time portals to solve puzzles.

Test Chamber 13

Start by placing portals as shown in the image. Use a portal to move the laser sideways and a time portal to send it into the future. You can take some damage from the laser to travel into the future. Once in the future, rearrange portals without affecting the present. Position portals so the laser goes directly into the target to complete the chamber.

Test Chamber 14

First, take a time portal to the present. Summon a reflector cube from the switch in the center and position it in the present as shown. Use a portal to bring a laser through the first node, then use the reflector cube to direct the laser into the next two nodes. Travel to the future. Use portals to bring a laser into the present through the time portal, ensuring it passes through the node. Retrieve the reflector cube from the future and bring it to the present via a time portal. Position the present reflector cube to hit all three nodes, adjusting as necessary. You may need to travel back 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

This chamber involves frequent time portal use. Begin by going through the particle field to 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. Head 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 back to the future and place a portal on the small wall in the laser room to shoot at the receiver. Return to the present; the laser should be hitting the first receiver, powering an elevating platform. Stand on the platform and shoot a time portal behind the node to raise the platform further, allowing you to summon a reflector cube. Place this reflector cube on the lip above the second receiver. Travel to the future via a time portal. Retrieve the future reflector cube and bring it back to the present using another time portal in the laser room. Position it to reflect the laser into the second receiver through the node. To proceed, 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. Finally, move the reflector cube onto the switch to complete the chamber.