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If you are scrolling down you may find information regarding the story line of Portal 1!Game plot - Portal 1
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.
How many chapters in Portal 1?
019 CHAPTERS
List of chapters in Portal 1
Portal Test Chamber 00
Portal Test Chamber 01
Portal Test Chamber 02
Portal Test Chamber 03
Portal Test Chamber 04
Portal Test Chamber 05
Portal Test Chamber 06
Portal Test Chamber 07
Portal Test Chamber 08
Portal Test Chamber 09
Portal Test Chamber 10
Portal Test Chamber 11
Portal Test Chamber 12
Portal Test Chamber 13
Portal Test Chamber 14
Portal Test Chamber 15
Portal Test Chamber 16
Portal Test Chamber 17
Portal Test Chamber 18
Portal Test Chamber 19
(Main missions only.)
How many side missions in Portal 1?
00 SIDE MISSIONS
How long to beat Portal 1?