Google Groups - rec.games.hack: Threaded archive of Usenet posts. (Discontinued September 1994)
Hack 1.0.3: Original source distribution with release commentary and history.
Hack and NetHack: Feature list, development history, and links to resources.
PaleoHack: Palm OS port. Changelog, play guide, source and executable files, and build instructions.
RevivedHack: Adaptation of PC Hack 3.61 to Windows. Background, screenshot, and executable.