Cliffford Mercenaries

Test Chamber 13: Place portals as shown to redirect the laser. Use a time portal to move the laser into the future. Travel through the time portal (taking some damage is okay). In the future, rearrange portals to direct the laser into the target. Exit the chamber.

Test Chamber 14: Travel to the present via a time portal. Summon a reflector cube 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 it into the next two nodes. Travel to the future. Use portals to bring a laser into the present through the time portal, ensuring it hits the node. Retrieve the reflector cube from the future and bring it to the present via a time portal. Adjust the present reflector cube to hit all three nodes. If needed, travel back to the future to retrieve the future reflector cube again. Finally, place the future reflector cube to reflect the laser into the receiver, completing the chamber.

Test Chamber 15: Go 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 the receiver. Return to the present. An elevating platform near the switch will power up. Stand on it 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. Pick up the future reflector cube and place a time portal in the laser room to bring it to the present. Position it to reflect the laser into the second receiver through the node. To bypass the particle field, use a 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 chamber.