the online hints provided with the Macintosh version of Border Zone, formatted by Torbjoern Andersson
the online hints from Leather Goddesses of Phobos, typed in by Audrey De Lisle
the online hints from Nord and Bert Couldn't Make Head or Tail of It, typed in by Audrey De Lisle
the online hints provided with late versions of Planetfall, formatted by Torbjoern Andersson
the online hints from Wishbringer, not available in the Lost Treasures of Infocom, typed in by Stefan Jokisch