5 links
Colossal Cave Adventure Page
rickadams.org
History of the original 'Adventure' by Crowther and Woods, information about the real Colossal Cave, hints, and downloads of various versions of the game.
David Tanguay's Review
sentex.net
Rated -2 on -5 to +5 scale. "If there was a good story to go with it, the first adventure game would have also been one of the best."
Delphi: Colossal Cave Adventure forum
forums.delphiforums.com
Forum for discussion of Adventure in its various forms.
Matthew Murray's Review
matthewmurray.net
Capsule review. "Adventure is worth playing today for the nostalgia and for the fact that well-designed games never do go out of style."
Prof. Dennis G. Jerz: Colossal Cave Adventure
jerz.setonhill.edu
About the history of the game and examples from some different versions.