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Without Portalgun: Haunted Testchamber

The test chamber WPTI-067. Mysterious and eerie place, hidden in the depths of Aperture Science.

It is known that during the passage of the testing track test subjects often die from the turrets, deadly lasers or fall in the toxic goo. It is sad, but it is the objective results of tests. However WPTI-067 stands out beyond that. It has no turrets, no lasers. However, all test subjects who tried to pass the test chamber, DISAPPEARED WITHOUT A TRACE! It is said that the test chamber is cursed. It is said that GHOSTS live here! ... Or dwarves ... Anyway, here there are all sorts of weird things. As a result, it was decided to exclude WPTI-067 from the test route and hide it in the depths of the laboratory, and it so happened that you were in front of its entrance. In any case, you have to go through this testchamber and stay alive. And of course, you still have no portal gun.