Armed and Dangerous: Computer gaming as we know it would not exist without ADVENT (as it was known in its original PDP-10 incarnation). by Eric Raymond
'Long ago, you might have played this game. Or maybe you’ve just heard stories about it, or vaguely know that “xyzzy” is a magic word, or have heard people say “You are in a maze of twisty little passages, all alike”,
'Though there’s a C port of the original 1977 game in the BSD game package, and the original FORTRAN sources could be found if you knew where to dig, Crowther & Woods’s final version – Adventure 2.5 from 1995 – has never been packaged for modern systems and distributed under an open-source license.
'Until now, that is.'
Open-Adventure: This code is a forward-port of the Crowther/Woods Adventure 2.5 from 1995, last version in the main line of Colossal Cave Adventure development written by the original authors. The authors have given permission and encouragement to this release.