Screenshot: Dwarf Fortress (Bay 12 Games)

If you want to know why Dwarf Fortress is coming to Steam, its co-creator Tarn Adams has one answer: health insurance.

“Healthcare costs generally are pretty much the whole reason,” Adams told Kotaku over email. “We’ve been doing fine with crowdfunding, but we’re getting older now, and one health problem that lands us in the wrong deductible or co-pay situation would be the end of full-time work on the game.”

Adams and his brother, Zach, released Dwarf Fortress in 2006 after four years of development. It’s an expansive, intoxicating game, where you corral a party of dwarves and create an underground colony for them, protecting them from various dangers along the way. Its ASCII-art world is meticulously detailed, creating wild scenarios where you freak out over a cluster of lowercase, gray letter “e”s on a screen because it represents an approaching elephant herd. Over the years, as Dwarf Fortress has gained a cult following and even been shown in the Museum of Modern Art in New York City, the Adams brothers have been able to support themselves through one-time donations from fans, as well as through their Patreon, where they make over $6,000 a month. But as Adams gets older, the cost of living has gone up.

“To afford healthcare, we have to make money, and it has to be enough money,” he wrote. “Crowdfunding has been great. I’ve survived for 12 years on it. But ultimately it’s not survivable in the current environment.”

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It hasn’t escaped Adams’s notice that similar games on Steam do extraordinarily well, like Prison Architect, Rimworld, and Gnomoria. “Sales there over many years are in the, what, million or so range? That’s still unfathomable to me—not because those games didn’t earn it, but just the number. That’s a big number, beyond the sort of metrics we see personally,” he wrote.

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Given those numbers, Adams said that putting the game on Steam was a no-brainer. If it succeeded, it could potentially match the sales of those other games. If not? Sure, he’s back at square one, but he’s still in a position he says is survivable.

Adams has been continually updating Dwarf Fortress ever since its release, and said that he doesn’t think Dwarf Fortress will ever reach a state where the game feels finished to him.

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“Oh, no, never,” he said. “I’m sure some games feel finished, maybe? But I’ve never written one that feels that way.” he said.

“If you conceive of your game a certain way, that there’s a path you’ve taken through the possible features, and you’ve polished and pared it down, and made good decisions, then perhaps it feels something like finished when you’ve realized your list. But, hmm, these are not skills I’ve been practicing broadly, though we do try to make each release feel somewhat contained to a few themes that work well with everything that’s already implemented,” he said.

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It’s been nearly two decades since Dwarf Fortress began development, and it’s possible that it will be in development for as long as Adams is able to keep it up. Putting the game on Steam is one path to sustainability for Tarn and Zach Adams. At least, it might keep their co-pays down.