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So I'm stuck in GLaDOS 17. I have put the cube on the button, connected the laser to its output, explored the back area of the room hoping for exits — but I could not find a way to reach the exit of the chamber.

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How do I get out of here?

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2 Answers 2

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You need to drop the cube while standing on the platform. The platform will be down while the cube is blocking the beam.

  1. block beam with the cube (on top of hard light)
  2. step on the platform
  3. make cube drop by redirecting the hard light
  4. beam will activate the platform, which will get you to the exit, cube will open exit
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    Man, I did it way more complexly than that. I fetched the water bottle from the back area, and used it to block the beam, then placed the cube, then went back and double-widthed the hard light, moving the bottle onto the outside, then went to the platform and moved the portal. Same basic effect, but stupider. :-)
    – Tim Sullivan
    Apr 20, 2011 at 3:24
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With pictures (for fun)

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  • 7
    s/for fun/for science
    – Shaun
    Apr 20, 2011 at 2:27
  • @Shaun comment +1 for sed!
    – Joe the Person
    Oct 15, 2011 at 16:35
  • But science == fun!
    – Flater
    Jan 13, 2012 at 13:50

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