Portal/Chamber 19: Difference between revisions
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This chamber (and the rest of the game) does not have an associated time challenge, so the only reason to learn how to go through quickly is for a speedrun. Like the moving platform part of [[Portal/Chamber 15|Chamber 15]], it takes too long to get through the corridors the obvious way, so use [[Portal/Tips and advanced techniques#Peek-a-portal|peek-a-portal]] instead. Upon reaching the platform above the fire pit, there are no more opportunities for clever tricks and it is necessary to follow the normal path, executing quickly and perfectly. As always, practice until your best moves are in muscle memory. | This chamber (and the rest of the game) does not have an associated time challenge, so the only reason to learn how to go through quickly is for a speedrun. Like the moving platform part of [[Portal/Chamber 15|Chamber 15]], it takes too long to get through the corridors the obvious way, so use [[Portal/Tips and advanced techniques#Peek-a-portal|peek-a-portal]] instead. Upon reaching the platform above the fire pit, there are no more opportunities for clever tricks and it is necessary to follow the normal path, executing quickly and perfectly. As always, practice until your best moves are in muscle memory. | ||
[[file:Portal_Chamber_19_Setup_Peek_1.png|thumb|Orange portal position for the first peek-a-portal.]] | |||
As you step out of the chamberlock, place a portal at the other end of the corridor high on the left wall. Place the other portal under your feet as you step out and fall through, getting a boost towards the first room. Disregard the energy pellet mechanism and advance just until you can see around the corner and along the first section of the corridor above the toxic goo. Place the blue portal on a wall nearby and the orange portal on the far wall to the right of the fixed grating in the corner and somewhat below your present level. From this portal, you will need to be able to sight underneath the sliding partition that blocks the next section of corridor, but not be so low as to touch the toxic goo and take damage. Turning to the left, slide to the right through the blue portal until the glow around the portal changes to orange, but not far enough to fall out of the orange portal and into the goo. Shoot a new orange portal along the corridor to hit the far wall at about the same height, i.e. low, but clear of the goo, and ''immediately'' slide left to emerge from the blue portal before the orange portal moves. The corridors are quite long (longer than in Chamber 15), so there is plenty of time to pull this off. Repeat the exact same thing to bypass the next section of the corridor, keeping below the bouncing energy pellet. Repeat again, but this time take more care over the new orange portal placement. By keeping the portals low, you can again sight under the partition that blocks the corridor. This next one needs to be in a fairly tight area such that you will be able to sight over the platform above the fire pit but under the obstructing end wall of the goo corridor. Practice until you can find this spot reliably. After pulling back through the blue portal, you will be looking through the portals directly at the fire pit. | As you step out of the chamberlock, place a portal at the other end of the corridor high on the left wall. Place the other portal under your feet as you step out and fall through, getting a boost towards the first room. Disregard the energy pellet mechanism and advance just until you can see around the corner and along the first section of the corridor above the toxic goo. Place the blue portal on a wall nearby and the orange portal on the far wall to the right of the fixed grating in the corner and somewhat below your present level. From this portal, you will need to be able to sight underneath the sliding partition that blocks the next section of corridor, but not be so low as to touch the toxic goo and take damage. Turning to the left, slide to the right through the blue portal until the glow around the portal changes to orange, but not far enough to fall out of the orange portal and into the goo. Shoot a new orange portal along the corridor to hit the far wall at about the same height, i.e. low, but clear of the goo, and ''immediately'' slide left to emerge from the blue portal before the orange portal moves. The corridors are quite long (longer than in Chamber 15), so there is plenty of time to pull this off. Repeat the exact same thing to bypass the next section of the corridor, keeping below the bouncing energy pellet. Repeat again, but this time take more care over the new orange portal placement. By keeping the portals low, you can again sight under the partition that blocks the corridor. This next one needs to be in a fairly tight area such that you will be able to sight over the platform above the fire pit but under the obstructing end wall of the goo corridor. Practice until you can find this spot reliably. After pulling back through the blue portal, you will be looking through the portals directly at the fire pit. | ||
[[file:Portal_Chamber_19_Last_Peek.png|thumb|Peek-a-portal onto the platform over the fire pit.]] | |||
It is hard to judge how far to advance for a peek-a-portal when you're facing directly forwards, so again turn to the side and watch for the color change. Then turn forwards and shoot the orange portal at the back wall over the fire pit and pull straight back before it lands. Your view through the blue portal will change and you can step through onto the platform. You're now done with peek-a-portal in this chamber; the rest follows the normal walkthrough, optimized where possible and executed promptly and perfectly. Have your moves memorized, don't dally and practice, practice, practice. | It is hard to judge how far to advance for a peek-a-portal when you're facing directly forwards, so again turn to the side and watch for the color change. Then turn forwards and shoot the orange portal at the back wall over the fire pit and pull straight back before it lands. Your view through the blue portal will change and you can step through onto the platform. You're now done with peek-a-portal in this chamber; the rest follows the normal walkthrough, optimized where possible and executed promptly and perfectly. Have your moves memorized, don't dally and practice, practice, practice. | ||
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When you're past the fan, turn to the right and shoot a portal along the wall and just under the suspended walkway to land on the far wall. You could put it high on the wall, but then you will be delayed by the fall. If you're keeping track of portal colors, now just go through the portal you're standing next to. Otherwise, if you've used the wrong color, you'll have to replace that portal. Once through, you're looking back towards the alcove into which you just came by going past the fan. There is a matching alcove and fan on the right hand side of the large room. Ignore the side rooms to your left and shoot a portal high on the wall above the right-hand fan alcove. Turn and jump through the other portal on the back wall to land on the suspended walkway. You're aiming for the part of the walkway that is wider than the center part so as to avoid over-shooting. Turn left and leave the room, passing a ''DANGER, ADMITTANCE TO AUTHORIZED PERSONNEL ONLY'' sign. | When you're past the fan, turn to the right and shoot a portal along the wall and just under the suspended walkway to land on the far wall. You could put it high on the wall, but then you will be delayed by the fall. If you're keeping track of portal colors, now just go through the portal you're standing next to. Otherwise, if you've used the wrong color, you'll have to replace that portal. Once through, you're looking back towards the alcove into which you just came by going past the fan. There is a matching alcove and fan on the right hand side of the large room. Ignore the side rooms to your left and shoot a portal high on the wall above the right-hand fan alcove. Turn and jump through the other portal on the back wall to land on the suspended walkway. You're aiming for the part of the walkway that is wider than the center part so as to avoid over-shooting. Turn left and leave the room, passing a ''DANGER, ADMITTANCE TO AUTHORIZED PERSONNEL ONLY'' sign. | ||
Turn to the right in the next room. Move to the left so that you can place a portal high on the wall that you are now facing. You need to shoot around the metal flooring that is bent down over your head and get the portal far enough to the right so that when you come out of it you will land on that strip of flooring. Advance to the edge, jump off and place the other portal on the floor under you. The jump is needed to ensure that the fling takes you far enough to reach the bent metal | [[file:Portal_Chamber_19_Fling_Shortcut.png|thumb|Placing the portal over the bent metal flooring.]] | ||
Turn to the right in the next room. Move to the left so that you can place a portal high on the wall that you are now facing. You need to shoot around the metal flooring that is bent down over your head and get the portal far enough to the right so that when you come out of it you will land on that strip of flooring. Advance to the edge, jump off and place the other portal on the floor under you. The jump is needed to ensure that the fling takes you far enough to reach the bent metal flooring. Press and hold the move-forward key until you can see to the left around the next corner. The tube with the jagged hole in it is up on the higher level, but you can't see it. The obvious way up is to trudge around to the bottom of the stairs and walk up. It is quicker, however, if you place a portal as close as possible to directly over the tube, turn around, drop back down to the lower level (but ''not'' through a portal there) and place the other portal under your feet to drop gently through. Turn around to find the hole in the tube and go in. | |||
After a ride in the tube, you will fall into a Vital Apparatus Vent (dispenser). Towards the end of the ride, look down, as this will give you the best chance of | After a ride in the tube, you will fall into a Vital Apparatus Vent (dispenser). Towards the end of the ride, look down, as this will give you the best chance of positioning yourself to land cleanly in the bottom of the vent and quickly triggering it to open. You will fall into Test Chamber 9. Immediately walk through the Emancipation Grid and towards the exit door. As you pass over the button and the door opens, place a portal on the wall behind it. Place the other portal on the floor just ahead of you and drop through. Turn at once to the right as you come out and go to where the chamberlock ought to be. But, there is no chamberlock, so just drop down the shaft. So that you are immediately ready to continue when you reach the bottom, turn through 180 degrees as you fall. | ||
Place a portal on the ''underside'' of the horizontal structure that you see ahead of you, place the other portal under your feet and drop through, turning 90 degrees to your right and moving forward. You are facing a pair of shiny metal pistons. Wait until they come down and move forward again to stand on the ''second'' one. Turn 180 degrees to look back at the structure that you just portaled out of. When the piston rises, place a portal on top of that structure. Turn around, drop off of the piston and walk in an arc around to your left, threading your way between the shiny steel pillars and up a short set of steps. Continue turning left and you will see the horizontal structure again. Crouch and on the bottom surface, close to you, place the opposite portal to the one you have on top. Keep going until you are under that portal, stand up and jump up out of the top surface. | Place a portal on the ''underside'' of the horizontal structure that you see ahead of you, place the other portal under your feet and drop through, turning 90 degrees to your right and moving forward. You are facing a pair of shiny metal pistons. Wait until they come down and move forward again to stand on the ''second'' one. Turn 180 degrees to look back at the structure that you just portaled out of. When the piston rises, place a portal on top of that structure. Turn around, drop off of the piston and walk in an arc around to your left, threading your way between the shiny steel pillars and up a short set of steps. Continue turning left and you will see the horizontal structure again. Crouch and on the bottom surface, close to you, place the opposite portal to the one you have on top. Keep going until you are under that portal, stand up and jump up out of the top surface. | ||
