The Aperture Alpha is a 25-maps-mod of Portal 2 with a complete custom story including our beloved Glados and six new testing elements.
Level one - actual screenshot
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The Aperture Alpha is a 25-maps-mod of Portal 2 with a complete custom story including our beloved Glados and six new testing elements.
Why is there an old aperture sign in the modern aperture area?
There is also the sign "Pump Station Alpha".