Dwarf Fortress is definitely one of those cases. I was (kind of) surprised it didn't make the list.
Beyond it being an ongoing epic masterpiece of a single man (with contributions from his brother), what's particularly amazing about Dwarf Fortress is how much it has inspired and influenced OTHER games being produced, despite being an extremely niche, unforgiving, and unapologetic game.
Beyond it being an ongoing epic masterpiece of a single man (with contributions from his brother), what's particularly amazing about Dwarf Fortress is how much it has inspired and influenced OTHER games being produced, despite being an extremely niche, unforgiving, and unapologetic game.