For the final day of Linux command-line toys, I have been provided with flashbacks to my TRS-80 days. I remember two cartage games. The deal with the parents was that time spent on mindless games (my pacman clone cartridge) must be balanced with learning (including logic puzzles). I had a book to learn BASIC and the other cartridge: a Colossal Cave (or clone) game.
Many thanks to opensource.com and @jehb for this series of articles.
May your holidays and vacation be filled with joy!