Quanta mod for Portal
Quanta is a full conversion mod for Portal that re-imagines the game in a new universe, based heavily on the 2005 in-development style of the game. Play as Subject 122-7605 - Quinton - as you traverse through the eerily vacant enrichment center in search...
Aperture Science Enrichment Center Enrichment Center Aperture Science Computer Aided Enrichment Quanta Mod Otal Conversion Xpansion Pack
Source: moddb.com