Portal is a single-player puzzle-platformer developed by Valve Corporation.
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How Can I Reproduce GLaDOS' Voice Modulation Effect? [closed]
One of things I'm particularly interested is how they transformed Ellen McLain's voice to GLaDOS' musical one. I don't think it's entirely a natural effect by voice acting, though I have to admit I ...
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How much gameplay does Portal provide? [closed]
I've heard from many people that Portal is a great game, etc.
I have a few questions about the game:
How long does it take the play through?
Is there a reward for playing it after beating it once?
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