Dwarf Fortress is an oddity across the games industry.
The life's work of brothers Tarn and Zach Adams (under the name Bay 12 Games), it has been in active development since 2002.
Released in public alpha in 2006, the original Dwarf Fortress reached the status of cult classic over the years, with a dedicated, hardcore community.
source https://www.gamesindustry.biz/slow-and-steady-wins-the-race-how-dwarf-fortress-reinvented-itself-after-20-years
