Portal is a first-person puzzle game. Players must solve physical challenges by opening portals to maneuver objects, and themselves, through the enigmatic Aperture Science Laboratories.
PortalChamber (pochmb_) is a new map series releasing as one chamber at a time.
Half hour of work and I have 4rd chamber. God damn I got so many 'Overflows' that I had to make this one smaller. Installation :
Put the content in downloaded ZIP file to your .../steamapps/yourname/portal/portal/.