This week, host Isaac Butler talks to Tarn and Zach Adams, two brothers who’ve been continually crafting and updating the video game Dwarf Fortress for two decades. In the interview, Tarn and Zach discuss the earliest versions of the game, which were available online for free in the early 2000’s and served as an important influence for games like The Sims and Minecraft. Tarn and Zach also discuss the intricate details of the game and the gigantic number of narrative possibilities that players can experience. After years of tinkering, the “fortress mode” of the game is finally available for purchase, and “adventurer mode” won’t be far behind.  After the interview, Isaac and co-host Karen Han talk about what happens when a project starts to evolve into something unexpected.  In the exclusive Slate Plus segment, Tarn and Zach explain how Dwarf Fortress ended up in the Museum of Modern Art.  Send your questions about creativity and any other feedback to working@slate.com or give us a call at (304) 933-9675.   Podcast production by Cameron Drews.  If you enjoy this show, please consider signing up for Slate Plus. Slate Plus members get an ad-free experience across the network and exclusive content on many shows—you’ll also be supporting the work we do here on Working. Sign up now at slate.com/workingplus to help support our work. Learn more about your ad choices. Visit megaphone.fm/adchoices