Are they built by Aperture Science?

( evil_andy : devilish rogue, Thu 13 Dec 2012, 0:25, Reply)

Needs more Stephen Merchant
"Ben Stead ‏@ZoomyRamen
@therealcliffyb @ThatTomHam It is the portal voice, Del Toro called Valve and asked for it."

There you go.
( executiverocker only wears C&A, Thu 13 Dec 2012, 0:27, Reply)

They've grown up a bit
eyeyeyeyeyeyeyey
( Extinct Jesus Dossier BRB...gotta penis..., Thu 13 Dec 2012, 1:26, Reply)

it's deliberate, they even hired the same voice actress

( HappyToast nevermind eh,, Thu 13 Dec 2012, 8:20, Reply)

Well obviously
They also applied the same effects to her voice. The question is why?
( evil_andy : devilish rogue, Thu 13 Dec 2012, 9:12, Reply)

I've heard
that Guillermo del Toro really liked Portal, and being Guillermo del Toro he called Valve and did some persuasion.
(Haz, Thu 13 Dec 2012, 9:20, Reply)