Valve Corporation · Valve^*

Portal

2007 first-person shooter · science fiction video game · puzzle video game +1^*

Where and when.

2007-10-10
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Platform
Microsoft Windows
2007-10-10
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2007-11-22
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Platform
PlayStation 3
Market
Australia
2007-11-23
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Platform
PlayStation 3
Market
Europe
2007-12-11
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Platform
PlayStation 3
Market
North America
2010-05-12
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Platform
macOS
2013-05-02
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Platform
Linux

* Provisional data