Dwarf Fortress (previously officially named Slaves to Armok: God of Blood Chapter II: Dwarf Fortress) is a construction and management simulation and roguelike indie video game created by Bay 12 Games. Available as freeware and in development since 2002, its first alpha version was released in 2006 and received attention for being a two-member project surviving solely on donations.
https://en.m.wikipedia.org/wiki/Dwarf_Fortress