| next = Portal 2 Chapter 4 Test Chamber 21 (Escape)
| next = Portal 2 Chapter 4 Test Chamber 21 (Escape)
}}
}}
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.
== Hazards ==
== Hazards ==
Revision as of 00:37, 22 July 2011
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Chapter 4 - Test Chamber 20
sp_a2_triple_laser.bsp
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 Portal-placement and multiple Thermal Discouragement Beams in order to proceed.
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