The M.A.R.T.I. Initiative is a mod for Portal 2 taking place in alternate facility to Aperture Labs during the 1980's, following their attempt to create an AI by the name of M.A.R.T.I.
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Description
Some screenshots of the first chapter.
Most subject to change or be improved.
I really like this air vent. Not sure why. Portal could use way more air vent moments I think.