Mushroom

Navigate Test Chambers 13, 14, and 15 in Portal Reloaded by mastering laser redirection and time manipulation. Learn how to use portals and cubes effectively to solve complex puzzles.

This section of the Portal Reloaded walkthrough covers Test Chambers 13, 14, and 15, focusing on the strategic use of lasers, portals, and time mechanics.

Test Chamber 13: Place 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 may 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 directly hits the target to exit the chamber.

Test Chamber 14: Begin by taking a time portal to the present. Summon a reflector cube 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. 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. The reflector cube in the present should now hit all three nodes; adjust as needed. If the future reflector cube was moved, return to the future to bring it back to the present. Finally, place the future reflector cube to reflect the laser into the receiver, completing the chamber.

Test Chamber 15: 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. 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 cube on the lip above the second receiver. Travel to the future. Pick up the future reflector cube and enter the laser room. Place a time portal to bring the future reflector cube into the present laser room, positioning it to reflect the laser into the second receiver through the node. To proceed past the particle field without going through it, use a portal on the other side or a time portal. Reach 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.