Turrets

Navigate the challenging laser puzzles of Portal Reloaded's Test Chambers 13, 14, and 15. Learn how to manipulate lasers with time portals and reflector cubes to reach your goal.

This section covers Test Chambers 13, 14, and 15, focusing on the use of lasers in conjunction with time portals and reflector cubes.

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 send it into the future. You may take 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 laser to reflect into the next two nodes. After this, travel to the future.

In the future, use portals to bring a laser into the present, ensuring it passes through the designated node. Retrieve the reflector cube from the future and bring it into the present via a time portal. Ensure the reflector cube in the present hits 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.

Finally, place the future reflector cube at the end of the node sequence so it reflects the laser into the receiver, completing the test 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 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 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 an elevating platform near the switch. 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 the reflector cube on the small lip above the second receiver. Travel to the future by placing your time portal conveniently. Retrieve the future reflector cube and enter the laser room. Place another time portal within the laser room to bring the future reflector cube into the present. Position it to reflect the laser into the second receiver through the node.

Now, reach the other side of the particle field without passing through it. Use an existing portal on the other side or a time portal to get around. Once in the present on the other side, 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 test chamber. Note: As per user comments, the order of operations for the reflector cube and hitting the third receiver may require moving the reflector cube onto the switch *before* firing the portal to hit the upper receiver, as grabbing the cube can disrupt the laser path.