Nano Drones

Test Chamber 13: Place portals as shown to redirect the laser. Use a time portal to move the laser into the future, then rearrange present portals to guide the laser into the target. You may take damage to travel into the future.

Test Chamber 14: Travel to the present and summon a reflector cube. Position it to direct the laser through the first node. Travel to the future and use portals to bring the laser into the present through the time portal, ensuring it hits the node. Retrieve the future reflector cube, bring it to the present, and position it to hit all three nodes. Finally, place the future reflector cube to direct the laser into the receiver.

Test Chamber 15: Navigate the particle field by using a portal and a time portal to move into the future, bypassing the field. Return to the present on the other side. Redirect the laser to the first receiver. Travel to the future, place a portal to shoot the receiver. Return to the present to activate an elevating platform. Use a time portal behind the node to raise the platform further, allowing you to summon a reflector cube. Place this cube to hit the second receiver. Travel to the future, retrieve the future reflector cube, and bring it to the present via a time portal in the laser room. Position it to hit the second receiver through the node. On the other side of the particle field, climb stairs and use a portal to hit the third receiver. Finally, move the reflector cube onto the switch to complete the chamber.