Portal 2 Chapter 4 Test Chamber 20: Difference between revisions

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 {{Test Chamber Infobox
-   | title      = Chapter 4 - Test Chamber 20
+   | title      = Portal 2 Chapter 4 Test Chamber 20
+  | valve-title= Triple Laser
    | map        = sp_a2_triple_laser.bsp
    | number     = 20
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 }}
-This is the thirtieth level of the game, and is the first level to be set within a fully-repaired and functional [[Aperture Science]] Test Chamber. This level requires the player to combine precise [[Portals|Portal]]-placement and multiple [[Thermal Discouragement Beam]]s in order to proceed.
+This is the twenty-ninth level of the game, and is the first level to be set within a fully-repaired and functional [[Aperture Science]] Test Chamber. This level requires the player to combine precise [[Portals|Portal]]-placement and multiple [[Thermal Discouragement Beam]]s in order to proceed.
-== Hazards ==
+== Contents ==
+=== Mechanics ===
+* Laser Receptacle
+* [[Discouragement Redirection Cube]]
+* Laser Relays
+* Light Strip (blue, pink)
+=== Characters ===
+* [[Chell]]
+* [[GLaDOS]]
+=== Objective ===
+* Complete GLaDOS' Test Shaft (Test Chamber 20)
+=== Hazards ===
 *[[Thermal Discouragement Beam]]
+=== Locations ===
+* ''Aperture Science Enrichment Center''
+* ''Test Chamber 20 (GLaDOS)''
 == Walkthrough ==
+{{Spoiler|block=yes|
+*Walk over to the Beams and place a portal on the wall on the left-side where the Beam ends.
+*Place the other portal to the column facing the three Receptacles.
+*Pick up the [[Discouragement Redirection Cube|cube]] that is already redirecting one of the Beams. Place the cube in front of the portal, so the Beam activates the middle Receptacle.
+*Pick up the other cube and place it over the beam coming from the ceiling. Aim it at the Receptacle on the right side.
+*Go to the [[Chamberlock]].
+}}
+It is also possible to complete this chamber without placing any portals if you position the cubes correctly and use a cube and quickly move the cube from side to side. If you do it correctly, holding down the strafe right movement key (default D) the door will open for a split second, letting you slip inside. This is a more difficult solution to the puzzle so the basic solution is recommended.
 == Video walkthrough ==
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 {{TestChambersNav}}
+[[Category:Portal_2_chambers]]