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Portal How to Beat Test Chamber 15 in Under 3 Minutes
Portal - Test Chamber 15 [Gameplay Walkthrough] 1080p 60 fps
Portal 1 Walkthrough - Chamber 15
Portal - Chamber 15 (least portals)
Portal: Shortcut in final part of Test Chamber 15
Portal - Test Chamber 15
Portal - Chamber 15 done with 5 Portals
Portal walkthrough - Advanced Chamber 15
Portal Walkthrough - The Advanced Test Chambers - Test Chamber 15
Portal 2 walkthrough - Chapter 3: The Return - Test Chamber 15
Portal Walkthrough: Test Chamber 15
Portal Test Chamber 15 - Least Steps (25 Steps)
![Portal - Test Chamber 15 [Gameplay Walkthrough] 1080p 60 fps](https://img.youtube.com/vi/z_dOvkkSdRM/hqdefault.jpg)
