Source
Tarn and Zach Adams told PC Gamer that Dwarf Fortress has surpassed 800k copies sold in just over a year since its paid release on Steam in December 2022.
The game sold over 160k units in its first 24 hours, significantly exceeding publisher Kitfox Games’ expectations. It surpassed the 300k mark in just six days and reached 500k copies sold by the end of 2022.
In January 2023 alone, Dwarf Fortress generated over $7 million in revenue, turning the Adams brothers into millionaires. Although a portion of this money went on taxes and salaries for new team members, it was enough to solve the “main issues of health/retirement that are troubling for independent people, as well as safeguarded the future of the game well enough.”