Profound Portal Proficiency
30
Finish every test chamber in Chapter 3 of "Portal Proficiency".
Comments:
Bridge Constructor Portal
Enter the Aperture Science Enrichment Center and experience Bridge Constructor Portal – the unique merging of the classic Portal™ and Bridge Constructor™ games. As a new employee in the Aperture Science test lab, it's your job to build bridges, ramps, slides, and other constructions in 60 test ch...
Enter the Aperture Science Enrichment Center and experience Bridge Constructor Portal – the uniqu...
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