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Navigate Test Chambers 13, 14, and 15 in Portal Reloaded by mastering laser redirection and time portal mechanics. Learn step-by-step solutions to solve complex laser puzzles.

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

Test Chamber 13

Begin by placing portals as shown in the image. Use a portal to redirect the laser sideways and a time portal to move the laser into the future. You can sustain some damage from the laser to travel into the future. Once in the future, rearrange the portals without affecting the present setup. Position the portals so the laser directly hits the target, allowing you to 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 direct a laser through the first node, then use this beam to reflect the laser into the subsequent two nodes. Afterward, travel to the future.

In the future, use portals to guide a laser into the present, ensuring it passes through the designated node. Retrieve the reflector cube from the future and bring it to the present via a time portal. In the present, the reflector cube should align to hit all three nodes. Adjust its position if necessary. You may need to return to the future to retrieve the future reflector cube again if you moved it in the present. Finally, place the future reflector cube at the end of the node sequence to reflect the laser into the receiver, completing the chamber.

Test Chamber 15

This chamber involves multiple steps and frequent use of time portals. Start by passing through the particle field to the left. Place a portal where the laser strikes 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 far 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 aim at the receiver. Return to the present. The laser should still be hitting the first receiver, powering up an elevating platform. Stand on this platform and place 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 use another time portal within the laser room to bring it to the present. Position it to reflect the laser into the second receiver through the node.

To proceed, reach the other side of the particle field without traversing it. Use an existing portal or a time portal to bypass the field. Once in the present on the other side, climb the stairs and place a portal on the upper wall to hit the third receiver. Move the reflector cube onto the switch to complete the test chamber. Note: As per community feedback, ensure the redirection cube is moved onto the switch *before* firing the portal to hit the upper receiver, as grabbing the cube can disrupt future cubes and allow laser passage.