Have you ever wondered: Why does Aperture look so different in Portal 2? There are holes in this story, questions left unanswered! Conversion is here to fill some of these holes. You will see completely new locations of the Aperture Science facility, and use new testing elements. You will travel with new companions and encounter new foes.
Concepts
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Will be it on Steam Game (Free-to-play or paid) or mod?
its free to play friend , u can see that on the main home page of conversion .