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Waking up in a seemingly empty laboratory, the player is made to complete various physics-based puzzle challenges through numerous test chambers in order to test out the new Aperture Science Handheld Portal Device, without an explanation as to how, why or by whom.
| Developer(s) | Valve corporation |
|---|---|
| Released date | 10 October 2007 |
| Publisher(s) | Valve corporation, ea |
| Mode(s) | Single player |
| Theme(s) | Science fiction, action, comedy |
| Classification | ESRB Teen PEGI 12 |
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