Portals

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The entrance to the test chamber is guarded by a portal, which suddenly opens and swallows a person in a orange jumpsuit, who disappears as if sucked into thin air. The subject's voice echoes through the room, saying, "It doesn't matter. I'm already dead." As he walks towards the exit, he encounters more portals that lead to various test chambers, each filled with deadly obstacles and challenging puzzles. The person in orange is forced to navigate these obstacles while being bombarded by GLaDOS's sadistic comments, making every step a thrilling experience.