Portal is a single-player puzzle-platformer developed by Valve Corporation.

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Who was the voice actress for GLaDOS?

What is the name of the person who did the voice acting for GLaDOS from Portal and has her voice been used elsewhere?
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Portal - Look Up and Look Down commands are not working

I am attempting to control the camera with the arrow keys in Portal 1. I bound the arrow keys to the 'Turn Left and Right' and 'Look up and down' commands in Settings, but when I tried to play, I ...
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862 views

Are these Portal challenges impossible?

I am playing Portal: Still Alive on XBox 360. In the challenge maps, there are advanced levels for chambers 13-18 named like "14: Advanced" and just like the standard chambers, they have medal ...