Portal Test Chamber 18 (Bonus): Difference between revisions

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* Place a portal on the next ceiling, near the back left corner.  Place the other on the ground near you, where you can see into it.  Peer in and orientate yourself so you will be facing the pushed-out wall panel above the exit, then jump in.  As you fall, shoot a portal onto the pushed-out panel and the other onto the floor below you.  You will be propelled over the floor button, hopefully landing fair in the middle of the doorway with nothing obstructing you.   
* Place a portal on the next ceiling, near the back left corner.  Place the other on the ground near you, where you can see into it.  Peer in and orientate yourself so you will be facing the pushed-out wall panel above the exit, then jump in.  As you fall, shoot a portal onto the pushed-out panel and the other onto the floor below you.  You will be propelled over the floor button, hopefully landing fair in the middle of the doorway with nothing obstructing you.   
* Hop over to the small button, positioning yourself on the far side of it, near the hydraulic door.  Step count here should be about 20.   
* Hop over to the small button, positioning yourself on the far side of it, near the hydraulic door.  Step count here should be about 20.   
* Activate the button and hop onto the framing on the inside of the door, saving a few steps by letting the ram carry you out.  When the door stops and tilts up, you'll fall off.  Nip out and shoot a portal onto the face of the sloping panel, then jump over the edge to the low floor, shooting your other portal as you fall, to go flying across the chamber.
* Activate the button and hop onto the framing on the inside of the door, saving a few steps by letting the ram carry you out.  You'll fall off when the door stops and tilts up.  Nip out and shoot a portal onto the face of the sloping panel, then jump over the edge to the low floor, shooting your other portal as you fall, to go flying across the chamber.
* As you approach the cubicle, do a physics-defying mid-air turn (by simultaneously moving forwards and right, and turning to your right) to curl in behind the cube.  Squat there and start picking off turrets by portalling the [[High Energy Pellet|High-Energy Pellets]] onto them.  This may take a while as you won't be able to see where the turrets' sighting beams strike the walls, and you may have to hop forwards with your cube before taking out the last couple.  If you're impatient you can take your chances with leaving the turrets live, but remember that taking a hit usually costs you a step.   
* As you approach the cubicle, do a physics-defying mid-air turn (by simultaneously moving forwards and right, and turning to your right) to curl in behind the cube.  Squat there and start picking off turrets by portalling the [[High Energy Pellet|High-Energy Pellets]] onto them.  This may take a while as you won't be able to see where the turrets' sighting beams strike the walls, and you may have to hop forwards with your cube before taking out the last couple.  If you're impatient you can take your chances with leaving the turrets live, but remember that taking a hit usually costs you a step.   
* When you're ready, step off the ledge with your cube and manoeuvre back into the lower niche.  About 40 steps now.   
* When you're ready, step off the ledge with your cube and manoeuvre back into the lower niche.  About 40 steps now.   
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* Hit the button then hop back, grab your cube and go through the portal.  You should land on the hydraulic ram, where you can squat down and wait for it to carry you in.   
* Hit the button then hop back, grab your cube and go through the portal.  You should land on the hydraulic ram, where you can squat down and wait for it to carry you in.   
* Make your way out to the floor button and set your cube on it.  Then shoot a portal to the wall beside the exit door facing you.  Jump down to the lower platform, set a portal on the floor and go through.  Crouch down and aim through the doorway to place a portal on the ceiling at the end of the corridor, then shoot the other portal under you to drop through.   
* Make your way out to the floor button and set your cube on it.  Then shoot a portal to the wall beside the exit door facing you.  Jump down to the lower platform, set a portal on the floor and go through.  Crouch down and aim through the doorway to place a portal on the ceiling at the end of the corridor, then shoot the other portal under you to drop through.   
* Set a portal on the first platform then hop off into the pit and begin your ascent in the normal way.  As you fly out of the inclined panel at the end, try another aerial turn to swoop into the final exit, saving a few more steps.   
* Set a portal on the first platform then hop off into the pit and begin your ascent in the normal way.   
* As you fly out of the inclined panel at the end, try another aerial turn to swoop into the final exit, saving a few more steps.   


=== Time ===
=== Time ===
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