Web Directory

» GameFAQs
   Cheats, reviews, images, and a message board.
   http://www.gamefaqs.com/computer/doswin/data/934386.html

» GameSpot
   Reviews, news, previews, images, videos, cheats, and a forum.
   http://www.gamespot.com/pc/action/portal/

» GameSpy
   Review, previews, news, screenshots, and movies.
   http://pc.gamespy.com/pc/portal/

» IGN
   Videos, screenshots, cheats, guide, reviews, previews, news, and a message board.
   http://pc.ign.com/objects/842/842671.html

» Wikipedia
   Article describing gameplay, synopsis, development, and critical reception.
   http://en.wikipedia.org/wiki/Portal_(video_game)