Arabic 
English 
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.
معلومات إضافية
| Developers | Valve Corporation |
|---|---|
| Publishers | EA, Electronic Arts, Microsoft Game Studios, Valve Corporation |
| Genres | Adventure, FPS, Platformer |
| Platform | Steam |
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