Portal/Chamber 18: Difference between revisions

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== Advanced ==
== Advanced ==
{{Sect-stub|No solution}}


Floor 1 to 2 requires placement of the floor portal on #2 while doing the double fling.
Numerous changes have been made to make the advanced chamber more difficult. At the beginning, the ceiling is no longer portalable. Instead, place an orange portal as high up as possible on the wall. Create a blue portal on a wall you can walk to, and step into it. Make sure you don’t fall into the water, and instead shoot a blue portal on the ground so that you fling across the water.


In the arena, the lift is already active, but you need to avoid the turrets.  
If you’ve done that already, you probably notice that there is now seemingly no way to get up to the next level. What you must do is while you are flying over, shoot a portal of either color onto the floor of the next level. If you miss, just shoot a portal back to the beginning and jump through to try again. Once you succeed, place the other color portal on the wall and jump through.


In the jump section, platforms will lower when you jump onto the next one.  
Now you should be on platform 2. Again, no ceiling to get to platform 3. If you look below platform 3, there is a block on the right wall that seems pushed out enough to stand on. Create a portal just next to this, and come through slowly so you don’t go swimming. From here you can see the low platform in between 3 and 4, and a nice wall above it, so portal up to it. Walk to the edge of this platform and you can see a wall above platform 4 to portal to. As you walk through, you might as well fling over to the button, so create the appropriate portal below you as you fall.


== Challenges ==
The next room has no pellets, which makes getting rid of the turrets a lot tougher. On the other hand, two of the walls have portalable surfaces much higher, making it possible to reach the turret platforms yourself. The low fling platform has also been moved to below the cube and button areas.
{{Sect-stub}}
=== Portals ===
Part 1, 2 Portals Needed, 0 Portals Used


From the starting point, walk forward until you reach the ledge. Look at the ceiling on the far side of this area. If you look to your right, at the edge of the ceiling, you might be able to see a higher ceiling beyond the obvious ceiling you're looking at already. You may have to move around a bit to see it. Place an exit portal on the non-obvious ceiling then place an entrance portal on a wall behind you. Look through the portal and you'll see a surface you can land on to your right. You will have to move right while falling or you will fall into the liquid.
Get to a slightly higher ground, such as the extended platform near the pellet receiver. Place a portal in line with the first turret (closest to the entrance), at about the right height so that you can fling into the turret and end up safely on its platform. Quickly move if necessary to the edge of the platform to avoid the second turret’s fire. The game will auto-save once you have done so (after each turret), so you will not have to repeat them all. Place a portal to get ready to fling to the second turret (the one currently closest to you), and another one on the ground of the main platform. Jump through and fling into the second. The third turret will see you, so quickly jump towards the wall you just flung from, shooting another portal low on the wall, and come on through to the main platform. The third turret you can easily jump to from a portal on the wall, and similarly for the fourth.


Part 2, 2 Portals Needed, 2 Portals Used
Now you can safely proceed as normal to the button. Unfortunately, the moved platform makes it harder to fling as you normally would. One way to achieve the necessary momentum is to prepare by shooting a portal at a high wall near the pellet receiver, and another at one of your accessible walls. Press the button, look through the portal, and wait for the platform to finish moving. Go through, shoot one portal on this platform, and another below you before you hit, and you will fling to the cube. Take the cube back toward the entrance, go back to the button, press, portal, and through you go. Cube on the button, and on to the last test.


Looking around, you should be able to identify the area you were just at. Looking left of that area, you will see a platform higher than your present location. Place an exit portal at the ceilng above it and place an entrance portal where convenient. When going through the portal, you will be falling straight down.
The last room is similar to the original, except that as soon as you reach the next higher platform, the lower one will drop into the water. What this means is that you must place the next portal on the first try for every jump except the original. Make sure you look down into the portal each time you go into one, as when you come out the other side, you will simply have to move your view down, rather than the confusing automatic re-orienting that would occur if you were facing front. If you mess up, you must portal back to the beginning and potentially start over, however you can actually start from the platform you just came from if you place the right color portal.


Part 3, 2 Portals Needed, 4 Portals Used
== Challenges ==
 
=== Portals ===
Identify the area you were just at. Look right. You will see two elevated areas; one to the right and one to the left. In between those there will be a platform that is lower than where you are now. Place an exit portal at the high-left-area's wall. You will be using this in a moment to fling  to the high-right area. Now jump down to the lower area and place a portal at the floor. IMPORTANT: DO NOT RE-CREATE THIS PORTAL - YOU WILL BE REUSING IT FROM ITS CURRENT LOCATION ON THE FLOOR. Walk and fall through the portal on the floor. You will be on the area previously identified as the high-left area. From here, jump down into the floor portal you made a moment ago to fling yourself to the opposite high-area. If all was done correctly, you should be standing right next to a button.
;Bronze at 30 portals
 
# Blue portal on the ceiling above the far area.
Part 4, 1 Portal Needed, 6 Portals Used
# Orange portal anywhere accessible. Fall through.
 
# Blue portal on the ceiling above the two-dot platform.
Quickness is important for this next part. You need to press the timer-button, run around the right side of the piston-door and place a portal on its wall surface when it has stopped moving (in the 45 degree position). Do not re-create the important floor portal mentioned earlier. Also, you will be shot at and likely hit while doing this. You must run back to the important floor portal and jump into it. You will be flung across the room of turrets to the far side of it and you will find a weighted storage cube. Pick it up; you will need it in a moment for the button you saw earlier. You may also need to use it to block the turrets from shooting you.
# Orange portal on the wall that you can jump into.
# Blue portal on the ceiling above the three-dot platform.
# Orange portal on the floor below you.
# Blue portal on the extended panels above the four-dot platform.
# Orange portal on the floor below you. Stand on the four-dot platform.
# Orange portal on the lower floor in between you and the button. Jump into it and fling over to the big button. Continue and press the small button to enter the turret room.
# Blue portal on any of the four scorch marks.
# (11-14) Orange portals on the spots that each turret’s laser is at on the wall. Wait for the pellet to travel through so it can hit the turret before shooting your next orange portal.
<ol start="15">
<li> Orange portal on the left far extended panel (facing the receiver). Wait for the pellet to pass through.
<li> Blue portal near the small button on your left.
<li> Orange portal near you (not on the entrance panel). Quickly go through and press the button to let the pellet in. Now ride the lift over to the other small button.
<li> Blue portal on either side of the small area you are currently in. Press the button and quickly walk through the portal.
<li> Orange portal on the angled platform as soon as it stops moving.
<li> Blue portal on the floor just above the water. Fall into it quickly and fling over to the cube. Grab it and ride the lift back to the main area. Drop the cube off and ride back again to the tiny area with a small button.
<li> Blue portal on either side of the small area.
<li> Orange portal on a wall near the entrance/exit (not the platform that moves). Press the small button, go through the portal, grab the cube, and exit. Place the cube on the big red button.
<li> Blue portal anywhere on or above the four-dot platform. Jump down to the lower platform.
<li> Orange portal anywhere accessible. Walk through, and continue to the last room.
<li> Blue portal on the first platform.
<li> Orange portal at the bottom of the large drop. Start your fling as normal.
<li> Orange portal on the one-dot platform.
<li> Blue portal on the two-dot platform.
<li> Orange portal on the three-dot platform.
<li> Blue portal on the angled platform.</ol>


Part 5, 1 Portals Needed, 7 Portals Used
;Silver at 25 portals


There is a room directly below where you're standing. This part can be tricky. You'll need to walk towards the ledge, fall off, and then immediately move backwards so that you land on the ledge of the room below you. If you fail to land on the ledge below you, you will fall into the liquid. From here, there will be a wall on your right. Put a portal on it - again, not the all-important floor portal. You can drop the cube off through the wall portal or jump with the cube. Take note that you will be jumping into a wall portal and coming out through a floor portal, so you must be sure to move sideways immediately or you will fall back in.

Many shortcuts are possible, but here’s a set that hits 25 exactly.
# Blue portal on the ceiling above the far area.
# Orange portal anywhere accessible. Fall through, being ready to place the next portal.
# Blue portal, as you fall, on the floor of the two-dot platform.
# Orange portal on the wall that you can jump into. Go through.
# Orange portal on the ceiling above your current platform (two-dot), directly above your floor portal. Look into the floor portal to prepare for the next portal, then enter.
# Orange portal, as you fall, on the far left corner (or close to it) of the floor of the three-dot platform. Flying back into the blue portal, you will fly up through this new portal and be able to maneuver onto the platform with the big button. Continue and press the small button to enter the turret room.
# Blue portal on the scorch mark located on the wall you just entered from. Aim a little low and to the right, but make sure the pellet will still enter this.
# (8-10) Orange portals on the spots that each turret’s laser is at on the wall. Wait for the pellet to travel through so it can hit the turret before shooting your next orange portal. This time, don’t worry about the turret farthest from you.
<ol start="11">
<li> Orange portal on the left far extended panel (facing the receiver). Wait for the pellet to pass through.
<li> Orange portal near the small button on your left. Run and jump, holding towards the blue portal, and you can travel through it. Press the button when you come across to the other side to let the pellet in. Ride the platform to the tiny area with the other small button. Since there’s still a turret, you may want to jump early to avoid fire.
<li> Blue portal on either side of the small area you are currently in. Press the button, and wait for the angled platform to stop moving.
<li> Orange portal on the angled platform as soon as you can. Quickly come on through.
<li> Blue portal on the floor just above the water. Fall into it quickly and fling over to the cube. Grab it and use it as a shield between you and the turret as you jump to the lift and ride it back to the main area. Drop the cube off and ride back again to the tiny area with a small button.</ol>


Part 6, 2 Portals Needed, 8 Portals Used

Portals 16-25 are the same as portals 21-30 in the bronze description.




You are now standing next to the important floor portal. You will see two high areas above you (not the less-high platform). If you move around, you should see a wall that you can shoot a portal at. Place a portal on that wall - again, not the important floor portal. Step into the floor portal. You should land on the high area and there will be the other high area with a button on the other side. You can throw the cube through it first so that it lands on the other side or jump with the cube if you think you are able to do it. In either case, you want to be on the side that has the button with the cube in your possession. Place the cube on the button. Walk to the ledge and jump to the lower area that has the floor portal but do not jump through the portal. Instead, simply walk into the portal once you have landed. You should now be on the high area opposite of the high area with the button. The door is now open and you can walk through it.
;Gold at 16 portals


Part 7, 5 Portals Needed, 10 Portals Used
Again, various shortcuts give you different amounts, but this is probably the easiest way to get down to 16. 
Portals 1-6 are the same as in the silver method. Stop before entering the turret room.
<ol start="7">
<li> Blue portal in the middle of the low platform between you and the four-dot platform. Now move to the entrance to the turret room. Prepare for the next fast move by crouching under the metal support, within small-button-pressing distance. Do so, and walk towards the left side of the panel, moving into the room as soon as possible. Quickly walk around to the front of the angled panel.
<li> Orange portal on the angled panel as soon as it has stopped moving. Very quickly continue all the way around the panel, exiting the room again from the opposite side of the panel (in order to skip the slow crouching). Run past the small and big buttons, falling into your existing blue portal. If you have done this fast enough, you will be flinging towards the cube. All 4 turrets are still active, but if you are all the way in the back and centered left and right in the cube area, none will be able to see you. Grab the cube, crouch, and use it as a shield against the two left turrets (stay a little to the right to avoid the right two turrets) as you inch closer to the edge. There is a room directly below where you're standing. This part can be tricky. You'll need to walk off the ledge while holding the cube, and then immediately move backwards (and possibly sideways) so that you land on the ledge of the room below you. Move back to avoid additional turret fire.
<li> Orange portal on a wall on either side of you. Take the cube with you through this portal. Take note that you will be jumping into a wall portal and coming out through a floor portal, so you should be sure to move sideways or you may fall back in. Now with your back towards the near wall, move left and look up and right.
<li> Orange portal on the extended panels above what is the four-dot platform. Walk with the cube through it and onto the four-dot platform. Now you need to fling both yourself and the cube back to the button. You may want to drop the cube in the portal first, but it is possible to fling while holding the cube. Place the cube on the button. Walk to the ledge and jump to the lower area that has the floor portal but do not jump through the portal. Instead, simply walk into the portal once you have landed. You should now be on the four-dot platform. The door is now open and you can walk through it to the final room.</ol>


Walk through the door and keep walking until you fall to a lower area. You will see platforms in front of you and a large drop to your left. If you have played this area before, you should know what to do and it should work fine. If not, continue reading. This part requires timing and thought. If you take a look at the platforms in front of you, you may notice that they progressively get higher. What you'll need to do here is put a portal on the bottom of the large drop you saw when you came in (that was on your left). You will also initially need to place another portal on the first platform. What will happen when you jump through the portal on the bottom of the large drop is you will be propelled upward high enough so, that at the peak of your launch upwards, you can send another portal to the next higher area. You must also alternate portals if you consider that if you just exited upwards from an orange portal, you will be falling back into the same orange portal when you come back down, which means you'd then need to place a blue portal on the next highest area (or place an orange portal if you just exited out of a blue portal). You will launch upwards out from four platforms this way. On the fourth one, there is an angled surface (45 degrees) on a far wall. When you are launched upwards from the fourth platform, you'll need to place another portal there as if it were the next platform. When you exit from that angled surface, you will be launched across the room to the exit.
Portals 11-16 are the same as portals 25-30 in the bronze description.


If everything has been done correctly, you will have used 15 portals, which is 1 less than needed for the gold ranking.
Additional reductions can also be made to this room to achieve sub-16 counts.
* Multiple methods can get you to the point of entering the turret room after using only 6 portals, reducing the count by one.
* This method gets you there with only 5, reducing the gold method by two. Move as far towards the drop and to the left towards the wall as possible. If you crouch and look to the right of the normal ceiling, you will be able to see a tiny part of the next higher ceiling. Shoot a blue portal there, and an orange one anywhere reachable. Be sure to maneuver yourself when you go through so that you land safely on the two-dot platform. Now face the three dot platform and move back and right as much as possible. Place an orange portal on the floor just in front of you. Hop to the other side of this. Look into the portal while crouching right next to it and spot the three-dot platform. You will want to place the next portal on the far left corner of this platform. Get ready, and walk through. As soon as you do, shoot a blue portal there, and hold left. Look down to aim into the orange portal, and fling up, maneuvering to the button platform. You can now continue at portal 7 in the gold method, which will really be portal 5.
* In the last room, place the portal on the two dot platform as far left as possible. When flinging up from this, it is very difficult, but possible, to place a portal on the angled platform directly from here, reducing the count by one. When facing the angled platform, hold right as you come up, shoot the portal when you can, and then hold left and look down to hopefully fall back in.


=== Steps ===
=== Steps ===
Ceegers
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