Portal Test Chamber 15 (Bonus): Difference between revisions

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* Place a portal as far ahead as you can see and another right in front of the chamberlock. Jump through and cancel the exit portal.

* Use floor-to-floor to get right against the emancipation grid.

* Continue as for least portals.

=== Time ===

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* Portal from just outide the chamberlock into the first wall-jumping chamber. Turn and place your portal on the projecting slab and get the jump going right away.

* As soon as you can see into the first pellet room, shoot your two portals onto the walls. Accuracy is all-important here - get the exit portal centred correctly above the doorway to the lift. But work fast to get the portals in place so you don't have to wait for a second pellet.

* Run-jump to the emancipation grid and wait for the pellet to come out of your exit portal. As soon as it emerges, cross the grid and place your two portals. If your initial exit portal over the lift was accurately set, you won't have to let the pellet bounce and mark the wall for you before positioning your portal.

* Run-jump to the emancipation grid and wait for the pellet to come out of your exit portal. As soon as it emerges, cross the grid and place your two portals. If your initial exit portal over the lift was accurately set, you won't have to let the pellet bounce and mark the wall for you before positioning your portal. Wait again for the pellet to emerge from the exit portal, then run out immediately.

* Wait again for the pellet to emerge from the exit portal, then run out immediately. Don't wait for the lift: as soon as you see a gap, shoot a portal onto the wall above and the other at your feet to get you up there.

* Don't wait for the lift: as soon as you see a gap, shoot a portal onto the wall above and the other at your feet to get you up there.

* The next room has a wide area of dead floor in front of the entrance. If you portal into it you'll end up having to run back to get into the side room with the steps. It's quicker just to run-jump into the room, shoot your first portal back onto the projecting slab and dash into the side room to start your jump.

* Use portal-through-portal (see above) to get over the slime. Try to get your last portal near the centre of the final room, where the ceiling is portal-friendly. Avoid the bouncing pellet, though - they have been shown to have a detrimental effect on human health.

* As you come out through the floor, shoot your ''entry'' portal onto the ceiling above. You should then drop back through the floor and come out through the ceiling. While falling, shoot the ceiling portal onto the floor right in front of the victory lift. Manouevre onto the lift as you pop up, and dash for the chamberlock.

* As you come out through the floor, shoot your ''entry'' portal onto the ceiling above. You should then drop back through the floor and come out through the ceiling. While falling, shoot the ''ceiling'' portal onto the floor right in front of the victory lift. Manouevre onto the lift as you pop up, and dash for the chamberlock.

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@@ Line 44: / Line 44: @@
 * Place a portal as far ahead as you can see and another right in front of the chamberlock. Jump through and cancel the exit portal.
 * Use floor-to-floor to get right against the emancipation grid.
+* Continue as for least portals.
 === Time ===
@@ Line 49: / Line 50: @@
 * Portal from just outide the chamberlock into the first wall-jumping chamber.  Turn and place your portal on the projecting slab and get the jump going right away.
 * As soon as you can see into the first pellet room, shoot your two portals onto the walls.  Accuracy is all-important here - get the exit portal centred correctly above the doorway to the lift.  But work fast to get the portals in place so you don't have to wait for a second pellet.
-* Run-jump to the emancipation grid and wait for the pellet to come out of your exit portal.  As soon as it emerges, cross the grid and place your two portals.  If your initial exit portal over the lift was accurately set, you won't have to let the pellet bounce and mark the wall for you before positioning your portal.
+* Run-jump to the emancipation grid and wait for the pellet to come out of your exit portal.  As soon as it emerges, cross the grid and place your two portals.  If your initial exit portal over the lift was accurately set, you won't have to let the pellet bounce and mark the wall for you before positioning your portal.  Wait again for the pellet to emerge from the exit portal, then run out immediately.
-* Wait again for the pellet to emerge from the exit portal, then run out immediately.  Don't wait for the lift: as soon as you see a gap, shoot a portal onto the wall above and the other at your feet to get you up there.
+* Don't wait for the lift: as soon as you see a gap, shoot a portal onto the wall above and the other at your feet to get you up there.
 * The next room has a wide area of dead floor in front of the entrance.  If you portal into it you'll end up having to run back to get into the side room with the steps.  It's quicker just to run-jump into the room, shoot your first portal back onto the projecting slab and dash into the side room to start your jump.
 * Use portal-through-portal (see above) to get over the slime.  Try to get your last portal near the centre of the final room, where the ceiling is portal-friendly.  Avoid the bouncing pellet, though - they have been shown to have a detrimental effect on human health.
-* As you come out through the floor, shoot your ''entry'' portal onto the ceiling above.  You should then drop back through the floor and come out through the ceiling.  While falling, shoot the ceiling portal onto the floor right in front of the victory lift.  Manouevre onto the lift as you pop up, and dash for the chamberlock.
+* As you come out through the floor, shoot your ''entry'' portal onto the ceiling above.  You should then drop back through the floor and come out through the ceiling.  While falling, shoot the ''ceiling'' portal onto the floor right in front of the victory lift.  Manouevre onto the lift as you pop up, and dash for the chamberlock.
 }}